This didn't occur in the UK because of better public transport, and less suburbanization (marginally).
All of the stuff you say is correct but local councils, generally, didn't approve retail parks...they just couldn't find a good enough reason to say no or they were built just outside the council area. And now councils are reaping what they sowed because they stopped houses going up in cities...now the locus of money has moved to the suburbs as new houses get built (and, somewhat unbelievably, councils made this worse but shutting down car parking on high streets during Covid...the economic mismanagement is staggering...but all due to their greed around house prices and trying to restrict cars to boost house prices in the areas local councillors live).
For a roadmap, look at the US after WW2 (we are somewhere in the 60s when independent department stores started failing en masse). We had department store chains built up in inner city areas so the collapse is, if anything, more violent. Most high street areas/shopping centres will fold, Debenhams was an anchor tenant in so many shopping centres. Tier 2 cities/towns high streets will be literally deserted in a few years. Most retailers that anchor shopping centres will fail (the big one that hasn't failed already is M&S, even Sainsbury's is vulnerable because I believe they anchor some small shopping centres), and you will see new chains thrive as retail parks spring up. I live near a town with under 10k people, they have put a retail park there with 4 stores, and before they all opened they added another two units. Aldi, Home Bargains, Food Warehouse...all fast growing chains offering products that undercut all the old economy shops.
It is really great to see. A lot of these chains are offering real value. In the town I mentioned, it was only Tesco who was known for gouging in locations where they were the only shop in town. Now they are being overrun: Tesco, Sainsburys, Aldi, Home Bargains, Food Warehouse.