Recent realtek SOCs and wireless could be supported, as they're real mips (or ARM, in some cases, albeit less in the router market) and their rtw88/ rtw89 wireless drivers have considerably improved over the earlier situation. But, it still needs a tremendous amount of work (as there are lots of missing bits and pieces to mainline), for generally rather low-end ('~uninteresting') devices. Most of all, it would need someone interested to put up with that specifically and do the development work and mainlining required.
Given the work required - compared to the relatively low-end devices (and the rather unclear situation of rtw88/ rtw89 in AP mode) involved and past history, it's not very likely that someone would suddenly show up to work on this. If there would be a fantastic device (high-end, lots of fast ARMv8 cores, plenty of RAM and flash, wifi7/ 6 GHz, you get the idea) for a low price, this could motivate others to look into it - but in the absence of that, you're either putting in the work yourself or wait until the end of days, just to see nothing happening. It's far easier to motivate enthusiasts to do groundwork development on high-end devices, than to get a single low-end device supported. The work is similar, but the potential reward of a having a nice device to work with that will do its job long term (and then trickle down into the lower end) is much more convincing - and you don't have to fight against memory/ flash constraints spoiling the fun.