I can't say I've made such a jump because I wasn't in such a (prolonged) situation.
My suggestions would be
Are you employed? Can you change projects/teams/work/customers within your company? If not, look for other opportunities. If that's all you get at your current workplace, and you want change, switch to somewhere else.
You have success stories of delivering. Even if tech and experience doesn't fully fit with other employers, they will value the experience you have.
Studying, possibly alongside work, is also possible, and not uncommon. That way you could widen your technical expertise without having a new employer already, possibly opening other opportunities.