Question about ASUS RT-AX86S

Can I set up a secure VPN server with the ASUS RT-AX86S without any problems? Unfortunately, this was no longer possible with my old ASUS RT-AC68U. A connection was only possible if I deactivated the security level in OpenVPN. Before I decide in favour of the ASUS RT-AX86S, I would like to know whether setting up the OpenVPN server is secure enough.