My response might be late, but you can go to settings -> content moderation -> media uploader -> change active service from regular servers to blossom servers. Also at the bottom, in Blossom servers container, you can manage them and set the default one.
Found it, but when I try to add one, I get URL invalid format error.
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Can you share with me the blossom server you're trying to add?
Stupid me, the spelling correction was adding a space after https: and before //
Thanks again 👍
Happens to the best of us haha, glad it worked for you 🙏