As an Orlando local Passholder, I got tired of waiting for communication from Disney so I paid what I call the Passholder Tax and booked a one night stay at Pop 2 weekends ago. As a result of that stay I now have full access to advance reservations even though I do not have a resort stay.
I now have the ability to book FastPass+ on a rolling 60 day calendar and I can have reservations on any 7 unique calendar days during that 60 day window at any one time. Once you have 7 days of reservations booked, you have to either use a day, let it expire or cancel it before you can book another day. All of the 3FP+ and one park per day constraints are the same as for non-Passholder resort guests. You can link other eligible guests and book shared FP+ as well as copy your reservations to another eligible guest in either the website or mobile app.
I made reservations on Sunday morning from home to go to DHS and ended up riding TSMM for the first time in over 4 years as a result. Once I got there, I was even able to change the time of one of my FP+ just like resort guests have been able to do for months now.
Basically, the ability to do this has been active in Disney's systems since last fall but they have not been able/willing to activate Passholders except after a resort stay.