One of the top comments explains how their rules likely will usurp the laws.

https://twitter.com/holonabove/status/1756087972510773372

DNC can switch at convention, bypassing state laws, using 2018 rule change listed below...

"Under Article 2 of The Bylaws of the Democratic Party, the Democratic National Committee (DNC) has the responsibility to fill vacancies in presidential and vice presidential nominations between national conventions.[3]

In the event of a vacancy on the national ticket, the chairperson would call a special meeting. Under Article 2 § 8(d), questions before the DNC, with some exceptions otherwise outlined in the charter and bylaws, are determined by a majority vote of the DNC members who are present and voting by proxy. The bylaws also state that voting to fill a vacancy on the national ticket must proceed in accordance with procedural rules adopted by the Rules and Bylaws Committee and approved by the DNC.[3]" ballotpedia.org/State_laws_and…

https://ballotpedia.org/State_laws_and_party_rules_on_replacing_a_presidential_nominee,_2020

edit: Techno_Fog has some info on this for 2022 Rule Update https://x.com/Techno_Fog/status/1725205163017707945