Yes, all ERC20 tokens are supported by Trezor.
Here’s a guide I made for how to add LINK in Trezor Suite. It’s the same for SHIB, just use the ERC20 address for SHIB instead of LINK. It may work to just transfer SHIB directly too, and it’ll get its token name automatically in Trezor Suite, but I haven’t tried that (yet).
Note that if you create a token name in Trezor Suite, but don’t use it and close the program, it’ll be gone when you open the program again. All tokens with zero balance are removed automatically when the program is closed, so you should wait to add the token until you’re ready to do a transfer to your Trezor.