Yep, I would wait if possible as Asus has already shown 2 new routers at Computex 2023 (RT-BE96U & GT-BE98).
If you still want to pull the GT-AXE16000 and FTTH P2P would be available at your place,
you can buy a 10Gbit (SFP+) media converter and order the matching SFP+ transceiver from Init7.
Delock SFP+ to RJ45 media converterHowever, I would currently advise against this, as you will incur additional costs of over 200.- :/