To use the Public GeyserConnect for your Playstation,

you must use a LAN proxy software that relays the GeyserConnect server as a local connection, connecting to your choice of us.geyserconnect.net or eu.geyserconnect.net or beta.geyserconnect.net with port 19132.

Android Device:

You can use either BedrockTogether or MC Server Connector app.

The GeyserMC Android app is no longer maintained for new game versions, and is no longer a usable option.

iOS Device:

You can use either BedrockTogether or MC Server Connector app.

Computers:

Download and setup Phantom on your computer.

You may also run an Android emulator such as Bluestacks to run the apps mentioned above.