Yes, which must mean it's a 3x3 (same as the EAP245). Of their upcoming HD620 and 660 Wifi 6 models the former is 2x2 and the latter 4x4[0]. And there is an somewhat oblique reference to this with the marketing copy talking about "4 streams". The article did say to hold off from purchasing wifi 6 equipment however.
[1] https://www.tp-link.com/us/business-networking/ceiling-mount...