I walked this in 2023. The way from Betanzos to Bruma was (for me) enough for one day.
The road splits off after Santa Eulalia (which is a nice place to have a rest and something that you have brought to eat, since there are no shops or bars after Betanzos). The route ascends through Sandy eucalyptus forest logging roads until you ge to the Encoro do Beche, the area surrounding which is under construction to create a large park and mountain bike destination with a (not yet completed) pool and a snack bar and toilets and lots of campers, holiday makers, and picnickers grilling meals.
This is another good place to stop because the rest of the day will be more walking on forest roads, always uphill, often alone until you get to the oasis of Casa Avelina in As Travesas. From there it is only a few kilometers to Bruma with its new Albergue (reserve ahead in season), and/or Mesón de Vento with its pension and hotel and easy next-day walk to the Camino.
I realize this is a sketchy description, but I hope it helps you to understand/plan this section.
All the best,
Paul