Additional, for root partition logic lock. You will need to pull most of your periphery logic to the top level and lock from there. you can refer to https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/tt/tt-intel-fpga-design-reuse.pdf for root partition logic lock.
You can use the default Auto size and Floating location LogicLock region properties to estimate the preliminary size and location for the PR region as well.
https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/qts/qts_qii51026.pdf page 4-18