You can clearly see diffused hair loss pattern on top of head on the photos. Early stage, but it is still alopecia. I have similar pattern but also receeding hairline.You are one dense mf… im diffuse thinning and no, my hair is not light brown its dark brown but thinning made it lighter.
As seen in pictures compared to my moms father we have exact same pattern.
https://ibb.co/ssth8fG
(lower left grandpa,lower right me in 2015,upper right 3months ago,upper left me in 2020) its a slow balding but its balding.
Also look at this post if you need further close-ups. Maybe thats your problem you cant recognize hairloss until you have no hair left lol.