What chains are supported by Rarible?

I'm curious to know which blockchain networks Rarible supports. As a platform for buying, selling, and creating digital collectibles, it's essential for Rarible to be accessible to a wide range of users on different blockchain networks. Are there any specific chains that Rarible prioritizes or focuses on? I'm also interested in understanding if Rarible plans to expand its support to other blockchain networks in the future. Could you provide some insight into this?