What To Do With Unknown Source Apps On My MacBook Pro?

Found unknown source (not from Apple or identified developers) apps that look suspicious
Hi, when I look at my Macbook Pro’s system information and then, software, apps. I see a bunch of (under the “obtained from” column) source “UNKNOWN” apps. Almost all my apps are from Apple or “Identified developer” but there are a few unknowns. And what is more I see a few were downloaded in the last few days and I didn’t load any new software.
What is your advice on what to do with these apps (from unknown)?? I recognise a few like Canon for my printer but about 1/2 are weird.
looking forward to your reply
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Roger