Sorry to hear about so many of you contracting insomnia from Covid-19.
I have not had Covid-19, but when I received the first Covid vaccination with Comirnaty (Pfizer/BioNTech), I got really bad insomnia for 7 nights. It took hours to fall asleep, then I slept for a maximum of two hours, woke up and the same thing over again. After 10 nights my sleep was back to normal again, the problem resolved spontaneously. The insomnia was a weird experience, the mind was completely awake but the body gradually got really tired over the sleepless week.
Insomnia is a known adverse effect of the vaccine, reported by the producer to be uncommon and happen in ≥ 1/1,000 to < 1/100. I find it biologically interesting that both the disease and the vaccine can give rise to insomnia and hope for research to clarify the mechanisms.

Have you seen any information whether the insomnia after Comirnaty can get worse with the second or third vaccination?