2FA notice - will it affect any custom Smartapps or Device Handlers?

I actually want to enable 2FA on my account, but I don’t know if it will affect any integrations (like Arlo, Ring, Harmony, etc.)…does anyone know the answer to this question?

It didn’t change anything with mine except for the experience logging into the actual app or the IDE. I didn’t have to do any reauth with any smartapp.