DS games didn't even worked with WPA. Only DSi Enchanced and 3DS games supported WPA2 at best. Your best bet is using older router with OpenWRT to make WPA3 to

DS games didn't even worked with WPA. Only DSi Enchanced and 3DS games supported WPA2 at best. Your best bet is using older router with OpenWRT to make WPA3 to WEP bridge.