Very normal to have suppliers run behind or out now thru early summer. I try to be proactive n have a bit more than I personally need sitting around. I have one full extra 10 frame Langstroth setup here n ready with everything inside including frames, foundation, QE, n top feeders. I keep couple cardboard n 5 frame Nuc’s here too just in case.
I’m returning to beekeeping after being away many years but I still remember we had to be ready n have extra back in the 1950’ n 60’s. We only had Sears to order things from n that always took time.
I’m lucky as I have a small woodshop so something’s I can make myself. Sometimes I need a plan “B”. Maybe let the bees do some foundationless comb. Or use a larger or smaller box than planned. It’s good to be flexible.
relax n don’t sweat the small stuff.
Good luck Bro … And enjoy !