I saw a lot of chamber in EMEA but it probably is more prominent in NA because there are a lot more baiting jetts whos playstyle it just fits more, in EU all the jetts are fearless as fuck.
If you compare in all "Valorant Champions Tour 2022" events this month, Chamber has 7% pick in BR, 12% in EU, 21% in CIS, on the other hand in NA Chamber have 43%. it's more than EU and CIS together. I don't know why, but it's curious.
Liquid is going to obliterate everyone with chamber, they have two non-duelist (for the most part since jampi plays jett on like two maps) players who could easily pick it up and dominate with it.