I have a Trezor, and I've sent short messages via the op_return feature.

I'm not entirely sure if its ordinal/ runes.

This was the info I found online, and then realised trezor has the op_ return feature and then I was able to send messages.

I believe there is something similar with most other self custody wallets.

https://github.com/merendamattia/op-return-tracking-message-bitcoin