Indian customs in the smaller international airports usually screens baggage before it gets delivered to the pax. At the exit, they have signs telling pax with X on the checked bags to report to the officer.

When BLR T2 opened, the customs twitter/x feed proudly talked about this screening: Bengaluru [BLR] connection/departure experience reports

CCU does the same. But during the pandemic they had one guy from the state health department spray each bag coming on the belt with some disinfectant which washed off any X. Inspired by that I now always have a wet wipe handy to wipe my bag when I take it off the belt