The hwclock tool provided by busybox doesn't work with recent glibc (2.31) due to deprecation of the setttimeofday() call. This impacts dunfell and newer. The upstream bug is https://bugs.busybox.net/show_bug.cgi?id=12756, but no fix.
Calling it out explicitly: the util-linux fix with explanation is at https://github.com/karelzak/util-linux/commit/cd781c405be82540484da3bfe3d3f17a39b8eb5c
fixed on oe-core: commit 524fff214a6adc823a99358248b3891ba7c0b915 Author: Sakib Sajal <sakib.sajal@windriver.com> Date: Tue Jul 21 13:59:45 2020 -0400 busybox: make hwclock compatible with glibc 2.31
see above comment