It’s now possible to let Bedrock players join your Minecraft: Java Edition server, and supports practically full feature parity between the platforms. Note this will only work for non-modded servers, such as the Paper server software, as Bedrock doesn’t
support running mods.
First, select the Software tab in the sidebar when viewing your server, then Paper, followed by the version you want to install - likely the latest if you want Bedrock players to be able to join smoothly. You should see a popup, where you can choose to enable crossplay. Click on this, then Install.
You can also go to your Console tab, scroll to the bottom, and tick the Enable Bedrock Crossplay box if you already have Paper installed!
Crossplay should now be configured on your server!
To join your server on Bedrock, use the regular subdomain (same one as Java) and port 19132. Example: srnyx.play.hosting with port 19132. Do NOT use the raw number IP/different port, it will not work!
If you have a whitelist enabled on your server, you can add Bedrock players to
it with the command fwhitelist add followed by their Bedrock username