As per this Blog it says SRM does not preserve VM reservation attributes.
SRM will not preserve reservations on failover - VMware vSphere Blog
If you see Mike Laverick comments(he is a SRM GURU) he says there could be an option to use powercli to export attributes and import them when the placeholder VMs gets replaced by Actual VMs, however while running a test fail-over or actual fail-over through SRM I am not sure where we can integrate these powercli scripts to replace attributes.
so unfortunately from my side this doesn't seem to be possible.
If you found my answers useful please consider marking them as Correct OR Helpful
Regards,
Hussain
https://virtualcubes.wordpress.com/