Mango ID and query (too much flowering)

Jez starts with ...
Hi, a couple of questions that I hope someone here can help me with.
The KP grafted part of a mango plant died but I kept the original rootstock and dump it in a part of the garden to worry about it later. It is now flowering but it needed to be pruned back as the branches were too tall due to it being too close to neighbours fence (will transplant a metre back for more sun). I’m guessing it is a Keitt mango, by looking at flower can anyone confirm this? It is pic of flowers only.
Second question is regarding my Nang Klang Wan mango, pic of full tree. It is about 5-6 years old, only 2m tall and all it does is flower every year and never goes into vegetation growth phase. All I ever get from nodes are flowers, flowered even grow directly out from trunk. I’ve just given it a does of nitrogen, will restrict watering and prune back to previous node after flowering. Does anyone have any ideas as to why it only flowers and never grows branches/leaves? Could it be stunted?
Cheers

Found this pruning YouTube vid for anyone interested. Instruction from 8:30.
https://m.youtube.com/watch?v=zh1AnvNa6mc