A few years ago I had an aerial splitter and amplifier fitted.
I had ONE rooftop aerial, but they fitted a device that amplified the signal that made the signal strong, and then split it into 4 cables that they ran to four rooms
All the cables went outside the house from the rooftop aerial.
I put one aerial socket in my living room, one in the front dining room, one in our main bedroom and one in our daughters bedroom.
So now we have 4 aerial sockets from the one aerial.
Contact a local TV aerial fitter to see if they can do the same for you.