Ask HN: For solopreneurs – how to you solve architecture?

I'm building solutions for some time now mostly I'm alone (at least from technical perspective). At the moment I have no capacity to hire an architect, nor would I have enough workload for one. However, as the solution grows I want to new features based on better architectural decisions. So I'm curious how do other founders are solving for this? Endless research online? AI discussion on better decisions? Hopefully there are some groups I'm not aware of where I could ask for my specific case and I would get advise (paid or not) on how best to approach the problem. Some guidance where to look would be highly appreciated.