I imagine that the reports already come link to the comment, post, etc., where you reported them from so they can see the offense.
Improvements of Reporting
If we can report comments, another idea would be the ability to report any message in the in-game chat, so moderators don't have to read all of it.
but when you report, all the data gets sent with the report (i assume, because its like that in many big games {i am a bit of a dev myself}) and anyone can inspect elements to fake evidence, but the data that gets sent with your report comes from the server (a player's massage gets processed and stored in a server, which is more reliable than just a screenshot)
for example, anyone can write "elon musk" but very very few can copy his signature
same with screenshots, anyone can fake them, but very very few can hack into servers and inject false information
So they say they are doing the best to getting players without manners and I was kinda mad about this. They need to get be punished.
I know your chess.com teams are doing the best to get them. So my Idea is giving the place to giving the team to see the clear evidence. Or giving the report w/ images giving the team more bigger alert than just reports.
So my main Idea is
Having the space for picture evidence when we are reporting and they will have more power than just reports