Is it possible to hack somebody's snapchat account?

You can with phishing, otherwise you need a big leak of accounts on dark web i guess

Yeah, everything can be hacked, there is nothing out there without bugs that you can exploit but you gonna have to try and know what you are doing to find out that kind of things. Black hat isn't an easy life

If the goal is noble, privacy will remain the deterrent principle for what you want to know

But as a warning:

Try not to open a link that gets your data like

IP address
System version
Device type
Application version
Mobile number

All data helps the hacker convince tech support

well kinda not sure but it is probably possible