Can I get a cost optimization review of my Azure environment from my CSP partner?

Many CSP partners offer this as part of their service, either included or as a standalone engagement — reviewing your resource usage, identifying right-sizing opportunities, flagging Reservation/Savings Plan candidates, and pointing out any clearly wasted spend (like unattached disks or idle resources).

If this isn't something your current partner has offered, it's a reasonable thing to ask for directly — most organizations have at least some easy cost optimization opportunities sitting unaddressed.