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So we definately need to talk about the options here and I work with many people undertaking exactly these projects. Cork has a slight resilience, it can handle small amounts of movement in the wall. However, cork can be tricky to work with if you want to hang heavier items as it’s softer compared to wood wool. Wood wool boards are also breathable and provide good thermal performance and denser typically a bit more durable in terms of load-bearing capacity compared to cork and have better structural integrity if you’re concerned about mounting things on the walls. You can use more standard fixtures with wood wool boards but heavy shelving and fixtures like this is where you require bigger fixtures into the wall behind the insulation and really need to think those through prior to the work being done.
Love to know more about the work and your overall approach.