The first things I would check is the TPS and the IAC. The IAC may be electronically fine but mechanically may be stuck. The only way to tell is to remove and manually try to push in the plunger or replace with a known good. The TPS will show higher voltage than normal for idle and should be obvious if the scan tool data shows this.
I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa
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