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As noted in bug 2122421, if a user creates a firewalld "ipset" a kernel log will be generated:

   Warning: Deprecated Driver is detected: ipset will not be maintained in a future major release and may be disabled

This is confusing for users. The log may cause them to think firewalld's "ipset" feature is deprecated. It is not.

Firewalld creates native ipsets (i.e. ipset command) and nftables sets. The native ipset is only needed for --direct rules. This is what triggers the above log. nftables sets are used for all firewalld primitives, e.g. --zone foo --add-source ipset:bar.

The kernel log can be avoided by only creating native ipsets if a --direct rule is in use.

Upstream commits:

f510855ae501 ("test(ipset): verify native ipset creation is deferred")
cdd015475e83 ("fix(ipset): defer native ipset creation if nftables")
4cff68200be9 ("test(functions): add IPSET_LIST_SET_ALWAYS")
79032494e1e9 ("fix(failsafe): log exception on fatal failure")

MR: https://gitlab.com/redhat/centos-stream/rpms/firewalld/-/merge_requests/11

Dropping from the RPL..Not enough votes..

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (firewalld bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2023:2546