fvtt-data-toolbox VS fvtt-EasyTable

Even presuming that an existing import tool (like Data Toolbox) is sufficient for your exact re-import needs and thus work wouldn't need to be done there, building a reliable exporter is unlikely to be substantially easier than just building a tool that does what you're after purely in Foundry.

I've never tested it, but maybe you can do it with the Data Toolbox module and a xml to csv converter.

You can use Data Toolbox module to input data into a compendium from CSV.

"In order to use the service with the TC assets, you need to sign up for the Moulinette Patreon at the Dwarf Miner Tier ($2/mo) https://www.patreon.com/moulinette as well as being at the Adventurer+ (5$) tier on my Patreon."

Available to Moulinette Patreons at the Dwarf Minor Tier ($2/mo) https://www.patreon.com/moulinette

The module I've used to import rolltables for a long time is EasyTable by Blitz. But note that it hasn't been updated in a long time, and while it still works in v10, for me it causes a bug that prevents me from right-clicking on a rolltable to see the options for it. So I only enable it for importing, and then turn it off.

EasyTable by Blitz: I don't think this one's robust enough

I know that EasyTable does exactly that, but I haven't tried it in version 9.