VPN sure, it can be annoying.
I didn't know Reddit blocked access when you don't have an account. It works fine on desktop without logging in, on mobile web for some content they lie about "this content has not been reviewed", but one click on the view desktop mode suddenly makes this a non-issue. Could be a geography based restriction.
P.S. I am not saying they are lying about the review status of content, they are lying about the reason for not showing content on mobile without logging in.