Renewing global talent visa

Hey all,
does anyone know how the renewing works , just curious if the global talent visa expires and if we want to renew it do we need to go through this process again?
because on this page " Apply for the Global Talent visa : Extend your visa - GOV.UK"
it states : you applied for the Global Talent visa based on an endorsement, and the organisation that endorsed you has not withdrawn its approval

how do we prove that?

You don’t need to get an endorsement again - you apply with the same endorsement.
Home Office will probably get notified by TN if they withdraw it so you don’t need to prove anything

thank you, is this the case even for global promise? because after 5 years I might no longer be eligible for promise

after 5 years apply for ilr

yes, but the thing is the promise duration is 5 years and Ilr is after 5 years.
and I am worried about messup in duration because maybe it takes some time for them to start counting my days in UK?

i plan to enter UK on day 1 of my visa start get a nice ticket and boarding pass proof and then go back to sort out the moving and come back in a months time max.
But just in case something messes up I wanted to know how to navigate that.