I have posted 3 devlogs. All are published for my Spaceshooter game that is under development.
I checked https://itch.io/devlogs but there I can't find my devlogs.

Is it because I wrote it myself or am I missing something?
Last devlog post can be found here: https://naxos84.itch.io/spaceshooter/devlog/37543/status-update-on-the-developme...

Can anyone else see my devlogs?

Hello, your devlog is publicly visible by anyone who goes to it by link or through your project page. The https://itch.io/devlogs page lists a subset of all devlogs though, since we have too many things posted daily of varying qualities to show everything. Thanks