Note that for OpenSSH, the default display offset is 10, so we don't have to set X11DisplayOffset if we want to use offset of 10. Similarly X11UseLocalhost, default is already yes.
As per man sshd_config:
X11DisplayOffset
Specifies the first display number available for sshd(8)'s X11 forwarding. This prevents sshd from interfering with real X11 servers. The
default is 10.
X11UseLocalhost
Specifies whether sshd(8) should bind the X11 forwarding server to the loopback address or to the wildcard address. By default, sshd binds the
forwarding server to the loopback address and sets the hostname part of the DISPLAY environment variable to localhost. This prevents remote hosts
from connecting to the proxy display. However, some older X11 clients may not function with this configuration. X11UseLocalhost may be set to no
to specify that the forwarding server should be bound to the wildcard address. The argument must be yes or no. The default is yes.