Yes, RISC-V is supported by major Linux distributions
Over the past few years, there has been significant progress in bringing Linux support to the RISC-V architecture. Several popular Linux distributions have made efforts to include RISC-V support, ensuring that software and tools can run on RISC-V-based systems.
Fedora: Fedora, a community-driven Linux distribution, has official support for RISC-V. Fedora's RISC-V variant, known as Fedora RISC-V, provides a complete set of packages, including a full desktop environment, development tools, and server applications.
OpenSUSE: The OpenSUSE community has been actively working on porting the distribution to RISC-V. The OpenSUSE Project provides a version called openSUSE for RISC-V, which aims to bring a fully functional openSUSE experience to RISC-V hardware.
Debian: Debian, one of the most widely used Linux distributions, has been working on adding RISC-V support. While it might not be as mature as other architectures, there are efforts to port Debian to RISC-V and provide packages for the RISC-V platform.
Many other Distro adding RISC-V support. Ubuntu, ArchLinux all have RISC-V support.