Is it possible to transfer IDNs and .zip domains to Cloudflare?

I'm currently working on transferring all the domain names I have to cloudflare. One of them (ends with .zip) shows "unsupported" in the transfer domains page, and 2 more (with IDNs) are showing "unsupported characters"

I looked up online and saw that supposedly IDNs are fully supported, and have been for some time now. Do I need to go through a different page instead of the regular domain transfer, or is it impossible using Cloudflare?
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