He did, and yes it was cut short, but not by the quarantine, it got cancelled before any of that started. Based on what happened in the book, the themes it was exploring, and some things Kibblesmith said on twitter, my impression is that it was cancelled because it would have conflicted with the story Cates wanted to tell with Thor. I don't remember the exact wording, but Kibblesmith said something on twitter about how the ideas he had for the book ended up being 'too good' or something like that, and in context... yeah, he and Cates probably hit on the same basic ideas, and Cates and Thor took priority, so Loki was cancelled. In the cancelled solo, it had Loki wrestling with the conflicts of wanting to go to Midgard and do stuff there, and trying to be a good guy, (though in somewhat.... let's say 'unconventional' ways) and it was very similar to what Thor is going through now as King of Asgard, where trying to be king and be a hero at the same time is not working. So the characters are flipped, but same idea, and I can see how they couldn't both work at the same time. But that's not all, there was a glimpse of the future, where Loki has Mjolnir and has to fight off an Evil Thor (who got taken over by Ultron, so more like Loki had to fight Ultron with Thor's powers) Also, some foreshadowing with the
first issue's cover AND a discussion Loki had with Iron Man, where Loki wanted to join the Avengers, and Iron Man told him he could do so only if Loki came to him with Mjolnir in hand and Loki was like 'fine, deal'. That all pointed to Loki getting Mjolnir, and taking Thor's place. He also made a deal with some cosmic entities, the Children of Eternity, break his fate and no longer be the 'God of Lies' and instead be the hero. The series never got to that place, but it was clearly working
towards that before it got the ax. So I think that may have been another conflict that led to the cancellation, because again, Cates is doing the same basic thing, strongly hinting at Loki getting the hammer and taking Thor's place. This is all why it's a bit iffy on how much of the recent solo actually counts, it may be that Marvel is trying to kinda quietly brush it under the rug, so Cates' story can just go forward without having to worry about what happened in Loki's book. Though, Valkyrie also had some conflicting ideas, like it set up Tyr rather than Blake to be the new God of Lies, but that was allowed to continue, kinda, in the form of a couple miniseries, but maybe Aaron just has more clout.
Anyway, that's to say I think because of the likely circumstances surrounding the cancellation, it's not a stretch to think they may try again, but with the writer being fully aware of Cates' plans and working with them rather than against them.
And the MCU is clearly building towards a Young Avengers....
something. It's set up Billy and Tommy in Wandavision (they got un-made, but they can always be re-made in Dr Strange) America Chavez in Dr Straange, got Cassie over in Ant-Man, Kate Bishop in Hawkeye, and you could throw in some other characters that weren't in the YA, but could fit, like Ms Marvel, or Iron Man's daughter. So Kid Loki would fit right in with that. The one concern is how fast do Asgardians (well, frost giant technically, but he apparently aged at the same rate as Thor in the movies) age? They live to be very old, way older than humans, so are their childhoods stretched out? That may pose a problem for allowing Kid Loki ti age up naturally.