If he is only limited to the force I'm not so sure. Aside from the recent force pushes Luke used against the Knights, I don't think he's actually used the force in battle in canon.
Registered: Jan 2020
Location: Chiss Defense Fleet
Not even the KOR (who are actually force users) could defend against Luke's TK when he decided to actually use it, so the PG will be even more defenseless to it.
One of the first things Luke said to the KoR was "you will leave here with nothing but your lives"... Which means Luke had absolutely NO intention of killing them, even though he knew full well that they were dark side users.
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"I am tired of Earth. These people.
I am tired of being caught in the tangle of their lives."
The fight in TLJ was stupid. Rey and Kylo could have decimated the guards with the Force but instead they brawled with them for some reason. Luke takes this.