IKEA does offer a selection of countertops; however, they may not provide custom-made countertops. Typically, IKEA offers a range of pre-cut countertops in various materials, sizes, and finishes that customers can purchase and install themselves. These countertops are designed to fit standard kitchen cabinet configurations available at IKEA.
If you require custom countertops with specific dimensions or unique designs that deviate from IKEA's standard offerings, it would be best to consult with a local countertop specialist or contractor who can provide personalized solutions tailored to your needs. It's possible that IKEA's product offerings and services may have evolved since I'm not interested in that topic as much as i used to and my answer might be a bit outdated, so I would recommend visiting the official IKEA website or contacting your local IKEA store directly to inquire about their current offerings and any potential custom countertop options they may have available.