No idea what my cat wants from me - wants my attention but doesn't engage at all

In the evenings after eating her dinner, my cat will tap on my arm and loudly meow at me for attention. I try to play with her, pet her, talk to her, put cat TV on, brush her, follow her, but no matter what I do she is not engaged in any of it and instead keeps staring at me. I have no idea what she wants from me. It is starting to get really frustrating and I have locked her out of the room to stop her from annoying me. Any advice or suggestions??!?!