Chosen Solution

My MacBook Pro is fully charged but is refusing to come on I remov d the battery and put it back in which should do the trick but it didn’t work

Will it start by itself if you disconnect the battery and plug the charger? With all the feedback you have given us all I can say is that you much likely have a motherboard issue, current sensing issue. Try and find a local shop that does motherboard level repair and that they try to have a closer look at your machine.