It doesn’t use the word attention, but this took 4 seconds to find. I am sure there are many others, some of which have definitely accused him of attention seeking using those words
Part of the perception issue may be that with Joe Manchin he is directly, obviously, and corruptly profiting from his coal holdings, so it is very easy to go there when criticizing him. Sinema has no such obvious conflict of interest to point to
ETA: oh! Wait! Just scroll up, every post that mentions attention also mentions power and money as additional goals. I’m tired