Interesting, thanks for sharing. I need to play with Sparrow, I like that they have recently integrated coinjoins through Whirlpool. Big fan of your guides btw, lots of great material on your site!

Sparrow wallet I think is the only wallet app with offering that feature, time lock your BTC to a certain block to be able to spend.
[I mention it in this guide](https://darthcoin.substack.com/p/move-your-btc-to-taproot-address)