Chase ran some sort of promo for using contactless cards thru 06/30, so we went nuts on the BA card. My card is US based. About 100 trx in 3 weeks in US, Italy, Austria, Slovenia and Germany. May have also used in Switzerland and Lichtenstein, don’t recall. No issues with amounts, from $1.00 to over $1,000. Did have to sign for most trxs.

hope this provides some useful datapoints.