you cannot be incel if you are mgtow:
"The Donnelly Study defined incels as adults who fail to find a sexual partner for six months or more without choosing so."
Incel, short for involuntary celibacy, is a sociological term and adverse life circumstance. The term describes individuals who can not engage in romantic or sexual...
incels.wiki
"'Involuntarily celibate' is a valid academic sociological term popularized in the Donnelly study. In the study, an involuntary celibate is a person who would like to have a "willing" partner to have sex with, but cannot find one for six months or more."
The Donnelly study, officialy titled "Involuntary Celibacy: A Life Course Analysis", was the first academic study to take the concept of involuntary celibacy seriously...
incels.wiki
if you wouldn't like to have a willing partner to have sex, you are not an incel, you are mgtow
"An incel (/ˈɪnsɛl/ IN-sel, an abbreviation of "involuntary celibate"[1]) is a member of an online subculture of people who define themselves as unable to get a romantic or sexual partner despite desiring one."
en.wikipedia.org
if you don't desire to have a partner, you can't be incel as you can see above