A report from the Commonwealth Fund discusses that if the ACA is overturned, it would be hard to sustain state-passed preexisting condition protections, given the ensuing loss of federal funding and likely dysfunction in the individual markets.
The report can be obtained at https://www.commonwealthfund.org/blog/2020/state-efforts-preexisting-conditions?utm_source=alert&utm_medium=email&utm_campaign=Health%20Coverage.