Yes it can be supported by a future firmware upgrade (which is in fact planned for a while now).

The clients I've used all support taproot but the device can't handle it yet.

Isn't supporting Taproot addresses a matter of what client you're using rather than the hardware signer? And even in the latter case, can't this be fixed by a firmware upgrade?

SpaceHodler

Bought two of them a while ago but I soon found out they do not support taproot addresses which makes them useless for my intended use. Cool devices though.