Is there a way to preserve my Sierra 10.12 recovery partition?

I bought my 2015 rMBP directly from Apple and it came with 10.12 recovery partition built in. Due to compatibility and performance concerns, I am erasing my SSD and cloning mojave from an external drive that has Mojave with HFS+ formatting to preserve HFS+ on my SSD. I will then migrate my data over using migration assistant. That is all fine, but I want to keep my existing 10.12 Sierra recovery partition on my internal SSD. Is there a way to wipe my drive without deleting the recovery partition or re-adding it after the SSD has been wiped?

The reason I am concerned about this is because I didn't 'purchase' Sierra when it was the current OS on the app store, so I may not be able to download it and revert back to Sierra if I don't have it.