According to this review it has Mediatek on it https://www.blacktubi.com/review/asus-rt-ax53u/
Do you see it listed in the https://openwrt.org/toh/start?
If not, only time will tell and anything beyond that is mere speculation.
FYI - OpenWrt support for RT-AX53U support has been added with https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=8c00fd9b4519bf0ef8fb3470a6df421b9f38c03c