There are multiple options how to install MS Office on Linux.
VM-based - Integrate Windows apps running in a Windows VM as native-looking in Linux
- Winapps, based on KVM, QEMU, Virt-Manager, and FreeRDP. Still actively maintained (getting Github commits).
- Cassowary, based on KVM, QEMU, Virt-Manager, and FreeRDP. Has a helpful GUI and apparently can auto-suspend the VM when no Windows app is in use. Last release in Feb 2022 and seems to be abandoned.
The VM-based options means can run Office 2021 or Office 365 including all apps, but for me it was quite buggy and when I encounterd some (FreeRDP-related?) bug in both Winapps and Cassowary that meant I could only start Excel with an external screen plugged in, I gave up. bug