interested to see if you have much choice .. the policy you load for entry determines how long you are stamped in for .. and the (separate) annual policy is compulsory.
my OX visa was stamped 2024 when I entered in 2019, on the surface, it looks like double insurance plus length of stay reduced 😵💫🤦🏼. (Assuming they won’t stamp anyone past 1 year as that is all insurance companies will sell)