Every vendor I’ve dealt with will go over their size and capabilities when pitching for work. Most claim to be at the forefront of technology and process. Then you onboard a team for general work and they follow your processes, or occasionally pitch for new sales.
If your company lacks technology or process maturity shouldn’t they be looking to help? It’s not just new work they should be pitching for. How would they improve development or test given the choice, what frameworks and process can help everyone? Ask your vendor what they can do for you!