Having multiple procedures - how dangerous is many hour general anesthesia?

In the next 365 days, I plan to have quite a lot of operations, such as a mommy makeover, but also bbl, rhinoplasty, lipo and similar procedures, but my doctor with whom I am doing rhinoplasty keeps me under anesthesia for more than 9 hours, so I am interested in whether frequent and very long anesthesia can have consequences on my health. Is it dangerous to go to general anesthesia for 3 months, which lasts for 8 hours, and can I have consequences in the form of a stroke, heart attack, and a year anafter the operation. Thank you very much