I'm looking for an on-chain wallet that supports Testnet4 as well as Mainnet. It could be a mobile app as well as desktop.
This is for an educational project for beginners. The bulk of it will be in Sparrow but I think it's important to experience restoring your wallet on separate software, so people can understand that it's portable.
Blockstream Green look like it supports only Testnet, not Testnet4.
Electrum does not.
There's this - https://t4-wallet.anyone.eu.org - but it doesn't feel very wallet-like, and you can't restore a seed phrase to it.
Any ideas?