Opening port 443 on Linux

I followed the instructions below using ufw, it worked fine and tested instantly for ports 80 and 22, but for 443 I get Connection refused on the test, and no ufw block or in syslog or sign of attempt in auth.log.

Does DO block 443 on their own?

$ sudo ufw status | grep 443

To Action From

443/tcp ALLOW Anywhere 443/tcp (v6) ALLOW Anywhere (v6)

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