I think you may be confused. Conservatives are critical of the modern interpretation of the Commerce Clause because it expands the federal government's ability to regulate activity inside of states. (see the citation from the conservative Heritage Foundation below)

It would then be consistent for conservatives to avoid using the commerce clause to force another state to change their laws. But conservatives are happy to be ideologically inconsistent in the interest of giant corporations.

https://www.heritage.org/the-constitution/report/commerce-co...