https://fred.stlouisfed.org/series/RPI
This shows the insane increase in personal income over the course of the pandemic.
Many made more money on enhanced UI benefits than in their line of work. This is a known fact.
People in this situation have more propensity to spend the marginal dollar than higher income earners. Spending as a percentage of income inversely trends with level of income.
It's true that some percentage of retail spending is spending shifted from other categories, but given personal income data, I doubt that's the primary cause.
Also keep in mind, there was mortgage forbearance, rent forgiveness, and student loan moratorium (which is still ongoing I believe).
Those factors don't show up in income, but will shift expenses from loan interest to goods most likely.