Play minecraft from ps4 on aternos server?

To my question, I opened a spigot server with aternos and installed the plugin GeyserMC. I myself play with the Minecraft Java edition on pc and my friend on PS4. However, he can't join the server. What can we do so that we can play together?

Unfortunately, you can only join a few "preset" servers on the PS4, but none of your own.