He has poked at Pierre many times. He doesn't really come out and endorse Pierre either.
Its actually getting tiiring with people trying to say "Pierre's base in collapsing..." Its not. Its not growing either, which is the problem.
Carney is still enjoying something of a honeymoon, but he has lost the "green" liberals for the most part. Trudeau didn't have one event that tripped him up but rather a thousand knife cuts.
Carney has probably been winning over flexible centrist support with pipelines, defence procurement, etc. So at this time, Carney has traded Far left greenies for some more economic minded centrist.
There is a good chance Carney rides it out until 2029 but what is the Liberal party will change. And I bet the NDP does nothing and actually grows. The far left want a home.