Well, I'm sure there is a concern for diversity. Oscar eligibility requires that a certain percentage of cast and/or production crew be diverse (in order to rectify racial discrimination whether it be conscious, unconscious, or systemic). And as a general rule, Disney Corp. is committed to diversity.
But it should be said from the outset that "race" is a Colonial pseudo-science created to justify colonialism and slavery (and the continuing bigotry that that falsehood engendered).
There is zero real-science evidence for 'races' of humanity. Saying that there are 'races' of humans based on skin color is equivalent to saying there are races of humans based on eye color or hair color or height.
However, we have a history where skin color was used to justify slavery and discrimination which continues to negatively affect the descendants of people of that skin color. And we still have a lot of people buying into the idea of "race." It would be better to simply call it "skin color bigotry."
And so, groups of people based on skin color or country-of-origin are still being discriminated against (consciously, unconsciously, and systemically). And the same type of discrimination was applied to women and minority sexual orientations and cultural backgrounds.
White males make up 30% of the U.S. population... or is it 38%? And right there we have an issue: Are Hispanic/Latinos 'White'? Even in the 50's and 60's, no one was discriminating against Ricardo Montalban or Desi Arnaz for being of some other race, otherwise the first interracial kiss on TV would have been on I Love Lucy. And yet, many of Hispanic/Latino background today are being treated as being non-White.
This confusion is codified in the Census which teases out "non-White Hispanic" from White. Very often (and sadly) it depends on how light-skinned they are and how they blend culturally in society (e.g., having no accent). Whereas if a Black person spoke, dressed, and acted within the "norms of mainstream society"... they still Black.
This same dynamic with Hispanics also applied to light-skin Jews or Arabs who could 'pass' for White, even though there's always been a strong streak of anti-Semitism in the U.S.
So.... bringing this back to LucasFilm: It's been a mess. The first trilogy was about a White family whose love interest (Han) was White. The prequels brought in more Black (and as a stand-in for racial diversity, aliens of all sorts of colors) actors... but it was still about White Anakin and his White mentor (Obi) and his White mentor (Qui) and his White love interest (Padme) against the White antagonist. The sequels tried to bring in more female agency and a main Black protagonist (Finn) and more 'racially' diverse cast... only to hone in on the White Protagonist and her White Mentor and her White frenemy against a White antagonist.
Solo so White Male (with White love interest and White male frenemy).
Rogue One tried the sequel formula: White female with diverse supporting cast... but... is Cassien Andor White or non-White? He's Hispanic/Latino like Din and Poe... but does that count as White or non-White nowadays? Din and Cassien have their own series, but is that a White or non-White protagonist? Either way, they all male.
Obi-Wan will be White Male. Clone Wars and Rebels were very White Male. Bad Batch will be all White Male.
We don't know what the make-up of Rangers or Acolyte or the two theatrical releases announced will be. Ahsoka will be led by a Black female... in orange paint. Lando is the only project that will definitely be led by a non-White protagonist... who is male.
Not announced on Investor Day, but there's still supposed to be a mostly-female ensemble project directed by Leyslie Headland.
So... in conclusion... if someone at LucasFilm is putting the brakes on new White Male projects (Obi-Wan excepted), its very clear why that may be true. White Males have had much more than their 30-38% representation in Star Wars so far.
And if someone wants to breahtlessly report that as insider information to fan the flames of their grudges against LucasFilm, remember the source. Purposely choosing main characters that are 'of color' and/or female, is not evidence of White-male-hate, but would be a course correction from a franchise so greatly dominated already by White male main characters.