Double cables at connectors

Square D main panel, Neutral wires and ground wires under one connector should be called out?

Second picture, surge suppressor on left side is this properly wired? attached to 15amp breaker. is this only protecting that circuit?

appreciate your input.

Not allowed
One wire per attachment in Canada they also need to be on separate Strips .

Surge Suppressor should be on a two pole breaker 15 amp should be all that is required ,Was there any directions

There were no directions, Thanks for the information

That device on the left side of the panel is on a two pole 15 amp CB.