Around the year 2019/2020 many suggestions have been made online on which flashes work with the pinless SL3 hot shoe. Since then most of those suggestions are no longer available for purchase.
Probably needless to say, but just to be clear, this is the problem with SL3 cameras:
It renders most 3rd party flashes incompatible.
My question is: how can I tell which flashes should be compatible? What part of flash specifications will make me go "oh okay, there's a 90% chance this will work"?
I know there are different degrees of compatibility. Some setups will let me just fire the flash and nothing else, some will let me influence the flash settings. But that's all I've learned so far.
Personally I'm going to use it mostly on macro photography with a diffuser. I haven't tried it yet but it looks like I could manage with just a simple cheap speedlite which doesn't offer too much.
I hear Godox tends to be pretty compatible, but can I just buy any modern Godox speedlite? (for example Godox TT350). I called the store, they haven't even heard of the SL3 issue! And for example they sell Yongnuo speedlites (e.g. YN-565EXIII) that they describe as "Canon hot shoe. Compatible with all Canon cameras." which I find even more confusing.
I also know there's this trick with flash transmitter&trigger combo, but that's not really what I'm after right now.