there are too few public electron cash servers, even fewer on testnet, and even fewer on onion. there are also not enough bch gateway nodes between internet and onion.

so I opened a new public electrumx server and full node for mainnet and testnet on ipv4 and onion.

ipv4 hostname:
onion hostname: kisternetg2pq7wx.onion

  node electrumx/tcp electrumx/ssl
mainnet 8333 50001 50002
testnet 18333 51001 51002

you're welcome.

interesting electrumx stats for mainnet and testnet