How to book award seats with Lifemiles?


I can find an award seat on United Mileage Plus for a Thai flight but can’t seem to find it on Avianca Lifemiles. Is this common and suggestions to get this booking as I hold many Lifemiles.
Also, has the miles gone up for 1 way J for Lifemiles to Asia from 40K to 50K?

Yes and Yes. United has way better award availability than Avianca. Also, from 1st Nov, J went up on United from 30k to 50k and F went from 40k to 65k. That was the sweet spot on their chart and I rekon heaps of ppl flew and bragged about it which kind of sounded the death knell for it.