VPN wouldn’t cause it to flag you as a bot, that’s a profile setting you control yourself. @[email protected] detailed how you can change it in comment below.

How to remove the bot flag ?

In the web interface, click your username, then settings, then uncheck the “bot account” checkbox, and click save.

Maybe because I use VPN. Reddit doesn’t allow VPN and lemmy too

the lemmy instance you’re using does allow VPNs.

It’s a flag you set up yourself, it’s in your user configuration.

Others have covered the bot flag, I’ll add a bit more to this

Maybe because I use VPN

Generally Lemmy (and Fediverse platforms) don’t use sneaky dark patterns or hidden blocks. If you are blocked in some way, there should be something indicating it.