I ran into the same problem with Trezor Suite. Annoyingly, there was no way to make it generate more addresses beyond the gap limit. I guess the developers figured most folks wouldnt need more than 20 unused addresses or something. I get why they want clean standardized defaults. But a little customization would be nice! The only solution is to try a different wallet app with your Trezor. Electrum lets you tweak the gap limit, so that could work.
But you can add more than one wallet to the trezor.
Let’s say you have a family of five.
Btc wallet
1)pop
2) mom
3) oldest kid
4) middle kid
5) baby
And three styles of btc.
Bc
3xx
1 legacy
So if you make five wallets of each and 20 addresses each
That is 3 x 5 x 10 or 150.
And I do not know what the limit of wallets for each of the three types.
So I know you can do 7 for all three as I had a lot of clients with different wallets on my trezor.
I think the issue is not a big deal if you just make multiple wallets.
Why not come back and let us know the max wallets per BTC style.
Legacy. 1 bla bla
Legacy segwit 3 bla bla
I could check later but I have a feeling that I could make way more by making tons of wallets on the same trezor.