Availability of symetrical speeds

I live in Miami, 33186. Recently - 09/02/25 - I received a communication setting up updates in equipment to provide our area with symmetrical speeds. Is there any planned date for the availability?
AT&T keeps knocking on my door with fiber offer, no contract, but I've been with Comcast since it was Cable Satellite (1992) and I prefer to keep the service than just have to go through all the hassle to change all equipment e services again.

Any input would be appreciated.

Cheers