It's more my lack of depth with any of those aside from maybe Laravel that I would feel dishonest calling myself senior. I've made CRUD apps until my eyes bleed, but not a whole lot else. I don't have a lot of experience writing tests. I don't really have any open source code to show employers, only past projects that I've made as a side project or for an employer. It's rare that I have to write anything original that isn't already covered by the existing conventions of whatever framework I'm using.

It just feels like a few years experience isn't "senior" when you look at the candidate market in general. I am probably well below the average numbers of years experience.

Stop over-analyzing this, and quit feeling "dishonest" calling yourself senior.

Just do it. Start referring to yourself and seeing yourself as a senior software engineer and the paycheck is likely to follow-- regardless of your technical merits or lack there of.

Far less qualified individuals than yourself successfully bill themselves as senior engineers or solutions consultants, and make several whole multiples of your pay doing so.

My two cents: you should apply for some senior developer positions. You should be honest about your skills, but also you should be confident and not sell yourself short. What's the worst that can happen? You are already not getting callbacks.