How can I bulk edit product metafields?

Hey all,

For the life of me I CANNOT figure this out. So I have a product metafield that I’m able to edit manually by going to each individual product page and inputting the data:

Which then adds it to the page like so:

I’m just wondering if there is any way in the backend to edit these all at once rather than having to do it individually. I also use Stock Sync and can’t seem to get that to work with the metafield section either. Thanks so much!