After this, I ran "ip a" to verify the connections, and it seems as though the wireguard connection was not successful.
root@gateway:~# ip a
1: lo:
mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens3:
mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
inet 10.0.90.12/23 brd 10.0.91.255 scope global dynamic ens3
valid_lft 2788sec preferred_lft 2788sec
inet6 fe80::2a0:98ff:fe45:477/64 scope link
valid_lft forever preferred_lft forever
4: nm-Network-1:
mtu 1280 qdisc noqueue state UNKNOWN group default qlen 1000
link/none
inet 10.0.110.1/32 scope global nm-Network-1
valid_lft forever preferred_lft forever