Exactly.
Pluginfo is a great tool yes, and recommended.
Note that just because a plugin doesn't have an ARM binary doesn't mean it's automatically giving problems. I still have a few Intel-only plugins, and they all work just fine in the current version of Logic - in fact, Logic is architected specifically to allow you to mix both ARM-native, and Intel-only plugins on an ARM Mac running Logic natively.
The solution is to identify the plugin causing the problem, and uninstall/reinstall/fix it, and this is true whether the plugin is ARM native or not. *Any* plugin can misbehave, have bugs or get into a crashing state, and this is unrelated to whether the plugin is ARM-native or Intel-only - although of course, the older and more unsupported the plugin is, the higher the likelihood it might not be behaving well on modern systems.