Mosquitto works well. EspEasy can connect from outside, Tasmota also, Node-Red without any problem. On the other hand, not a single Android client I have tried can connect, I should add that it 100% enters the password and login correctly!
Sep 07 15:12:57 DietPi mosquitto[713]: 1662559977: Saving in-memory database to /var/lib/mosquitto//mosquitto.db.
Sep 07 15:28:03 DietPi mosquitto[713]: 1662560883: New connection from 213.205.197.60:60464 on port 1883.
Sep 07 15:28:03 DietPi mosquitto[713]: 1662560883: Client <unknown> disconnected, not authorised.
Sep 07 15:28:46 DietPi mosquitto[713]: 1662560926: New connection from 213.205.197.60:57354 on port 1883.
Sep 07 15:28:46 DietPi mosquitto[713]: 1662560926: Client <unknown> disconnected, not authorised.```