When to report possible cheating?


Daily games allow the use of opening books and databases and other non-engine/tablebase resources. So having a perfectly played book opening can be expected at any rating level.
The Game Review accuracy scores are also not used for cheat detection and very short games and longer games with easier to find moves in the endgame can boost accuracies as well.
That said, discussions of cheating, potential cheating,or cheat detection are not allowed in the general forums.
If you would like to discuss join the following club
https://www.chess.com/club/cheating-forum