With Product Variants Reloaded app by SellersDash
you can increase the variant limit on Shopify and allow your customers to choose from upto 1000 real variants per product. This is not another Unlimited Options app, but allows you to sell more than 100 variants from a single product page. Besides the variants, you can also unify images and media from the child products and display them all on the parent product page.
The app also gives you tools that allow you to hide child product pages from your listing and search pages as well as setup redirection from child product pages to the parent product page. You can add unlimited master products and never have to worry about the 100 variant limit.