How do i update OpenOffice? I have a new Mac laptop.

Also, Apache has yet to release a Big Sur compatible version.

See: https://blogs.apache.org/OOo/entry/new-release-for-apple-s

At the moment Open Office is not working well with Big Sur: they are working on it. Please see https://blogs.apache.org/ooo/

Just to add, you may want to switch to LibreOffice which is compatible.

https://www.libreoffice.org/download/download/

Maybe a question for OpenOffice:

https://www.openoffice.org/