@Michaelflat1 from this thread, it seems to be confirmed that 1.2.4 supports ethernet backhaul https://community.tp-link.com/en/home/forum/topic/671042?replyId=1372078

@Marvin_S in the official website it for the EU version.. when would the US version be released? also the modifications only says "enchanced device security" p.s. my local website (indonesia) still...

@Neon1234XX strange my firmware version is 1.2.4 Build 20240509 rel.64683(5553) while yours is 1.2.4 Build 20240509(5347) maybe its different? also did you connect the AX53 LAN port to the AX23 LAN...

@SeventySix i wonder if you could go to your local tp-link website then download the 1.2.2 official version, then try updating in using the webapp? (also i got the update notif from the tether app...

@Neon1234XX have you tried connecting the ax23 directly to the ax53? without the gigabit switch

@SeventySix i think you could use the firmware update "Online Update" feature