There is a test pkg for Big Sur (Intel) for those keen to test it, please think of it as a beta test, there may be issues. (as in, hangs or crashes)
**BigSur**:
10th:
c1872a7d3b6106a49cdf19f270a98ba7 Fix panic without keepsyms, fix missing vnode_iocount()
ZFS requires keepsyms=1 to work on BigSur.
**Catalina**:
11th version
d906ee53bc0693e55359f4dee4a42f78 Fix race with zvol creation