Testing of customers at bars is likely to reinforce the illusion of a higher infection rate amongst Farang.
Of course Omicron arrived with inbound travellers, including the 28(?) Thais who were infected whilst visiting Mecca.
However, once it's here, it's likely to spread amongst Thais and Farang. So far, Thais have been able to dodge testing, whilst Farang arriving now have 2 PCR tests. So on a per capita basis, more cases will be detected among Farang, purely due to a higher testing rate.