(Disclaimer: I am a Wikipedia administrator – so you can consider me biased or an expert.)
The reviewer was following Wikipedia policy on subject notability. Once there is significant coverage of restic in reliable secondary sources, then it can certainly have a Wikipedia article. DigitalOcean and BackBlaze blogs unfortunately aren’t really considered reliable sources. We need to get into peer-reviewed technical journals.
Those articles probably shouldn’t exist, either. See “other stuff exists”.