You will see a lot of growth now. Beet seems to emerge, put a few leaves out, then sit there doing little while it drives a tap root down. Once it’s done that, the growth is quite amazing and yours will get to meeting in the rows before you know it. Mine has looked to be doing bugger all for the last week, but it’s visibly altered in the last few days, despite no rain. On the herbicide, I have always used a pre-emergence spray, which has been iffy (at best) when it’s dry after drilling. New agronomist advised 2 early post-emergence sprays instead, at around half the price. It seems to have worked every bit as well, but was perhaps harder on the beet? The last 2 years the (expensive) pre-em spray has done very little and i’ve Had to go in post-em several times anyway.