You’re milking her for his milk, or making him formula? Let her have nuts or grass if you’re struggling to get enough milk from her for the lamb. If you just want to keep her from drying up, daily milking should do it (twice daily arguably better) but take a little more than just enough to keep her comfortable. No need for nuts if she has grass and you’re not feeding the lamb from her milk.
Once the lamb has established the oesophageal reflex, which he should have by 48 hours if he’s taking his bottle well, you may be able to get him to suckle by sitting her on her bottom (slightly one-sided, as you would to look at her feet) and bringing him onto the teat. Squirt some into his mouth so he gets the idea. Once they realise there’s milk in there, they should keep trying.
Once he knows where it is, and he’s past the first two days, reduce frequency of feeds. So check his tummy when you go to feed him. If it’s nice and convex, he’s probably helping himself when you’re not there to see it
. Often they start drinking from mum but you don’t see it for several days
. It’s a lovely feeling when you finally see it!