"Neither of them" referred to the ipq9554 SOC and qcn6224 wireless (ath12k) of the be7000, not the well-known ax9000. Both SOC support (including the dreaded wired side, QCA has been neglecting in recent years in favour of their NSS based offloading) and the ath12k based wireless side will require significant development efforts.
EDIT: btw. the combination of qcn5024 (ath11k, 2.4 GHz) and qcn6224 (ath12k, 5 GHz) probably makes MLO, a big new feature of wifi7/ 802.11be, impossible from the hardware side of things (not that OpenWrt would support MLO yet, nor do upstream kernel- and hostapd fully support it at this point).