This cannot be understated. I am in the shipping business and the bottlenecks are horrible. LA/Long Beach for example is the epicenter of all the problems. There are easily a couple dozen ships waiting to dock. After than, the average sitting time at the port for a dry import container is 30 days before it moves. Other ports have been getting worse as a result. On the east coast Montreal is on the verge of a port strike as their CBA is expiring and that will cause a ripple effect across the board. Trucker shortages were an issue in the US even before COVID, now it is even worse. A lot of talk about next gen console shortages has been towards computer chips and other resource shortages, but transportation issues can take some of the blame as well.
Things are starting to get better. Terminal workers in LA are scheduled to get vaccinated starting this week. Unfortunately it is going to be months before things get back to normal.