running mempool.space locally on an Umbrel home does not fully support address lookups (504 gateway timeout errors). mempool.space recommends:
blockstream/electrs
If you have stronger hardware, consider running Blockstream's electrs implementation. It's the backend mempool.space uses, and is also what powers blockstream.info.
It would be great to have the option to run the blockstream/electrs instead of the default electrs to get more out of an Umbrel home being able to act as a local mempool.space instance.