Look. Any service that wants to interact with a TOR hidden service (in this case Tallycoin running on Umbrel) needs to also run a TOR daemon. This is not ideal and brings with it a lot of issues.

You can set up a reverse proxy on your Umbrel machine to allow make Tallycoin reachable via clearnet but it brings with it privacy issues (ie. you leak your IP address). Not ideal.

The IP address being leaked (and by extension your rough physical location.). That can lead to all sorts of issues, for example DDOS or black hats targeting your machine specifically to get access to your node (and your funds). Remember that every LN node is in practice a kind of bug bounty.

There are examples of individuals that have accidentally exposed their Umbrel nodes to clearnet having their funds swiped. Granted, this has mostly been when the default password was "umbrel", but still.