Is there a way to change the metric of non-default IPv6 routes learned via RA (proto ra)?

My setup involves receiving IPv6 routes via Router Advertisements (RA). - A global on-link prefix route (e.g. 2405:200:185:2666::/64 dev eth0 proto ra metric 110) I know you can use net.ipv6.conf.eth0.ra_defrtr_metric to lower the metric of the default route. However, I would like to modify the metric of the global prefix route added via RA, not the default route, but the proto ra route for the global /64 prefix. This route always appears with proto ra metric 110, and I haven’t found a sysctl or documented method to influence that value. Is there a way in kernel 6.1 or newer to set or override the metric of non-default RA-learned routes (prefix routes)? Thanks for the help!