For anyone interested, here is a video showing Glock internal safety mechanisms: (https://m.youtube.com/watch?v=Fg2tlV1oqVM).

A mechanical description of Sig P365 internal safety in comparison to Glock: (top comment from https://www.reddit.com/r/SigSauer/comments/c5ddz5/can_someon...).

Video comparing P320 to Glock internal safeties: (https://youtu.be/dLm23zJGSL0) Note: it does appear that P320 has a more robust internal safety design than the P365.