I'm new here and especially to home finance, so please be gentle with me

Research seems to suggest that banks typically offer bridging loans for 6 to 12 months only, but with the current state of supply chain issues, workforce shortages etc., this seems like a huge risk - new builds appear to regularly take longer than this in the wonderful pandemic world we're in right now.
My question is, is it possible to protect ourselves from this scenario at all? Could it be written into the build contract somehow? Could it be a clause in the bridging contract with the bank? Can we insure against it?
Advice is very much appreciated.
Michael