There are probably a few different things happening that make any prediction difficult.
I walked in 2010, the previous Holy Year, starting in SJPP just before Easter and arrived in Pamplona on Good Friday. The towns through to Los Arcos were packed, but after that things eased up as the many Spanish pilgrims who were walking for a week over Easter departed. I would expect that something similar would happen every year.
Second, compared to the previous year, the number of pilgrims arriving in Santiago increased significantly. This effect was planned for in 2021, although clearly COVID disrupted that, which would have been a factor in extending the Holy Year observances into 2022.
And third is the impact of COVID itself, which I think is going to be uncertain. Those like you who have deferred and are planning to go will be eager to do that. That will add even more to the numbers. But others might be waiting a little longer to see how things emerge in a post-COVID world. It would be a brave person guessing at the balance here.
Finally, it is not clear that you have walked the Camino before. If you haven't I hope it is a wonderful experience for you. I didn't think much about the fact that I was walking in a Holy Year. To be a little trite, the Camino was what it was, and I had no idea what was normal or not.