Enshrining abortion rights in state law will be meaningless if Republicans gain control of Congress and write new laws restricting or abolishing abortion under federal law. Lindsey Graham already introduced a 15 week abortion ban. They could also go with a 6 week ban like Texas instituted shortly before Roe v Wade was overturned or they might even find a way to classify all abortion as murder under federal law.
State law doesn’t trump federal law. At best, states might choose not to enforce the federal law and leave it up to federal agencies to police and enforce.