Working on self hosted public-pool.io on StartOS here: https://github.com/remcoros/public-pool-startos

Supports mainnet and testnet4. A testnet4 bitcoin core node service for StartOS is here: https://github.com/remcoros/bitcoind-startos

Currently running a Bitaxe Supra on testnet4.

Note 1: StartOS cannot forward the stratum port yet, follow instructions from the StartOS UI (or Instructions.md on github).

Note 2: I haven't found a block yet and have not tested on regtest (yet).