time trial: pacing on bike
Yes, but with an asterisk next to it.
I hadn't raced the 3k since I was in HS, so last September when I had to cancel on a race due to car trouble, I did a solo 3k time trial and beat my old PR from HS by 14 seconds. Is it still a PR? Yes, but it also has an asterisk next to it.
Due to COVID-19, time trials might be the norm for the next few months.
It's your PR so yes, it is. Is it "official"? No, not at all. Just you and the pacer on the bike know it is.
At least you know that you could at some point in the future, with all things being equal, get in an official race and probably go faster.