Every time the pee-tape story is about to slip out of my mind, Trump brings it up in a public forum. In 2021, he announced, “I’m not into golden showers,” while addressing the National Republican Senatorial Committee retreat, though no one had asked. He brought it up during at least two separate speeches he delivered in Ohio last fall. And he mentioned it again on Saturday during a campaign rally in Fort Dodge, Iowa.
You're pretty much simultaneously claiming that Cummings was an astute liar but also an incompetent fool. Cumming fooled almost half a nation into voting against their interets, in a vote that Nigel Farage called 2 days prior - "If I lost 48 to 52, I'd be out campaigning the very next day".
Boris didn't join the Leave campaign because of Cummings. He joined after his meeting with Lebedev. Much to the surprise of his old school mate David Cameron, who went on record saying as much in interview at the time.
Personally, I think Dominic Cummings is nothing but a weasel looking out for his own interests. Meanwhile, Boris Johnson is nothing but a knock off Rowan Atkinson character, performed by fellow Oxford alumni Alexander Boris DePfeffel Johnson. Someone who desperately wanted to be able to charge the same for his private party appearances as "Former Prime Minister Tony Blair".
What would Cummings have to have lied about or been incompetent about in order for BoJo to have afforded him enough respect to do the things you're pointing out?