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.

Crossplay should now be configured on your server! If you head to the Network tab of your server, you’ll see the address and port your players need to use when connecting via Bedrock:

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