Yes, the Acer Predator Connect X7 is basically compatible with the FRITZ!Repeater 1200 AX, but there are important differences in the way it works depending on the type of connection.
Types of compatibility Standard WLAN extension (compatible): The FRITZ!Repeater 1200 AX can connect to any conventional WLAN router that supports the 802.11ax/ac/n/g/a standards. Since the Acer Predator X7 uses Wi-Fi 7 and downward compatible standards, a connection is possible without any problems. Mesh functionality (limited): A true "WLAN mesh" with functions such as seamless transition (roaming) only works fully with the FRITZ!Repeater 1200 AX in combination with a FRITZ!Box. With the Acer router, the repeater only works as a conventional Wi-Fi amplifier. Intelligent mesh functions of the Acer system (such as the "multi-link mesh") are primarily optimised for Acer's own devices such as the Predator T7 or the Acer Wave 7.