Elaborated MDEV-32347 description test demonstrates how a prepared user XA transaction
gets rolled back:

CREATE TABLE ti (c INT KEY) engine=Innodb;

XA START 'xid_i';

INSERT INTO ti VALUES (1);

XA END 'xid_i';

XA PREPARE 'xid_i';

# --error ER_XAER_RMFAIL

LOAD INDEX INTO CACHE c KEY(PRIMARY);

XA COMMIT 'xid_i';

SELECT count(*) = 1 FROM ti;

# => 0 (sic!)

LOAD INDEX INTO CACHE and CACHE INDEX ... must also error out which is not done (by at least LOAD INDEX) either.

No other sql commands, form either DML:s or DDL:s class, are found to produce similar effect.