1. I need to load or save the player's Armorer Workshop data to link the BungeeCord, How do I do this?
2. Armorer Workshop also released a plugin. How do I get player data in version 1.19?

when you install it, it will solve the data problem of aw

When the aw data is synchronized to another server, the skin will be displayed when the player joins the server. Of course, you need to manually synchronize the files in the skin database.

No.. Server data linking has already been completed, but only Armorer Workshop data remains, so I asked what to do.

1. are you using multiple servers?
2. I don't understand what you want.

Yes, the basic player data has been linked using mysql, but I am leaving a question because I need to link Armorer Workshop data.

Are you saying that I need to create a plugin using the system provided at https://github.com/SAGESSE-CN/Armourers-Workshop-Plugin?

for mod: we use capabilities API provided by forge.
for plugin: we use persistence data API provided by bukkit.

If you need to support mysql, you need to use a plugin or mod yourself to solve this problem.

You can try HuskSync, It will synchronize persistence data for you.