Thanks. So what model Asus would be a better model to get closer to the speeds I am getting from my providers device?
None of them. Their fastest router can handle around 200-250 Mbps of OpenVPN throughput. You'd need a desktop-class CPU like an Intel i3 to handle anything close to that (assuming the VPN provider also supports anything close to that as well, which I doubt).
According to the changelong and the first post, the current version of OpenSSL is vulnerable and should be upgraded to 1.1.1i, per OpenSSL Security Advisory of December 8, 2020:
None of the built-in services can be remotely exploited in this manner on a router.