U-Boot/UKI Relationship Regarding Multiple DTBs

[vindicator]

Is u-boot capable of selecting the correct DTB in a UKI during boot?

I saw "doc/README.multi-dtb-fit", which at least somewhat addresses
what I'm looking for I think, but I'm not sure if that will relate
directly with executing a UKI that has multiple DTBs...

For my one board, I was working on building a workable "tinyconfig"
kernel, but then also had the thought to maybe also build another
"allyesconfig" kernel (one time) so I can figure out everything that
gets used for ANY board (supported for $ARCH).
Then another thought came after that, that maybe I could pile in all
of the DTBs the kernel supports into a UKI (via "ukify"), which is
where I came across https://github.com/systemd/systemd/issues/31946
(convenient timing being so recent).

So it looks like my thinking is "doable", but just hasn't been done
yet in "ukify", and I'd thought I'd check here if there's anything
that needs to be done from u-boot's end as well.