Feeling like you have nothing to write about and writing nothing are 2 completely different things.
Most people don’t write.
However, there are some who sit at the desk with the intention of writing, yet nothing comes out because they’re stuck on “Nothing to write about”.
If you’re part of the latter, you’ve definitely got something to write about—that’s why you’re sitting at the desk with the intention of writing.
Telling your judgement filter to shut up takes work, but it will be well worth it.
You’ve got something to write about, so go write it out.