Project Gentoo has recently made an announcement regarding the revival of work on MIPS and Alpha architectures which have faced stagnation in recent years. This decision was taken following the emergence of enthusiasts interested in utilizing architecture data. As a result, relevant Stage devices and binary packages are now being published for MIPS and Alpha, along with the processes of checking dependencies and testing in the continuous integration system.
For MIPS Abi, support is available for Abi O32, N32, and N64 in both Big Endian and Little Endian options. In the case of Alpha, apart from the Stage Books, an additional installation CD-image has been prepared for user convenience.
For more information, you can visit the official announcement on the Gentoo website.