Any mid-range laptop should work for this just fine. I travel with an Lenovo Ideapad 5, no dedicated GPU, 16 GB ram, i5-1135G7 CPU, and it works fine for culling, editing, and even occasional application of heavy modules like D&S.
If anything, I would consider a laptop with at least 16GB RAM. They are pretty common these days and you may find 8GB constraining.
Note that if the CPU has a weak integrated GPU (many Intel CPUs do), Darktable can still make use of it with OpenCL and it can help.