In theory yes, practically, there are many problems... thats why it is not really supported.
If you used the cloud, it will remember in that region that you have a T6. Otherwise you need to patch a few files(make a S6 out of your T6) and disable the signature check (as some files are protected). For some firmwares on builder.dontvacuum.me I had that signature check patched, but not in recent firmwares. It is always a lot of effort to patch the checks and only applies to a very small number of users. If you use Valetudo, it does not matter if you have a T6 or S6.