Just searched in Korea. Samsung used to make them but not anymore, they seems to herd that market towards the Z flip now.

Latest flip phone available on the market is a 2025 Chinese 4G phone.

Personally I would settle with a keyboard that can be attached to a generic bar type phone that can be slid out so I can ssh into things, but alas even that is impossible it seems.

Cloudflare have “workers” that can run code, and anyone can create them, my guess is abuse? You can try contacting cloudflare.