I know of several family small, niche, gift related wholesalers / makers who opened last week and benefited as a result.
In each case they run a small warehouse out of their own office and are able to pack and ship without a large staff infrastructure.
Them being open and communicating this meant that plenty of retailers ordered top-up stock from them. The retailers may not have done this, or not noticed the opportunity, had more suppliers been open.
One of the lessons from Covid is to be opportunistic, to act deliberately to leverage opportunities you feel may be there. This goes back to what I wrote on December 21 about January plans.
One of my own shops would usually close between Christmas and New Year. This year we opened. The result was well worthwhile. We compete in our high street situation with several other stores selling gifts and cards. They were open. We all had the same idea. I suspect they did as well as us.
January will be different this year. Holiday patterns and arrangements have changed.