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And your title also suggests that the researchers modified the virus, they did not. They used an existing mutation in their experiments.
> We isolated an HPAI H5N1 clade 2.3.4.4b virus from wild birds in Korea with 96% E and 4% K at amino acid position 627 of PB2. To investigate the genomic characteristics of this clade regarding mammalian adaptation, we studied the replication and transmission of the H5N1 virus in mice.
No. Your title is still editorialized.
EDIT: And to add, from how you've edited your original reply to me I'm disinclined to ever do anything for you, no matter how politely you phrase it.