I set up a TEOS watchtower on node without txindex and pruned (https://prunednode.today), and it is reachable through Tor.

Here are the tower details if you want to test it meanwhile it watches your back! You will need to install TEOS plugin on your CLN node. It's for testing purposes. Might stop it in a month or so (or maybe not 🙃)

Here how to install the plugin: https://github.com/talaia-labs/rust-teos/tree/master/watchtower-plugin

Onion: http://ygrb66xi53wjb52bwdy7y5dyazandyr3qwctz4cceimq4sqaoignbbyd.onion:2121/ Tower id: 029ba52e776f450fbc10ac237c84579ca001a94945fd93881b0657e23c8df0b1af