Breakthrough to the water connection and bathtub faucet

Hello forum, I have moved into an old house and want to install a bathtub. On the other side, there is a washbasin. I now need to modify the water pipes so that I can connect a bathtub faucet on one side and a washbasin on the other side. Also, I have to somehow close the hole again. I urgently need tips from you on how I can accomplish all this so that I understand it. Thank you very much Olli

Somehow the picture didn't work out

I would probably replace the angle valve with one that has 2 outlets and then connect the bathtub faucet using a flexible hose.