I feel like my husband family likes my oldest son more than my youngest

My oldest is almost three and third grandchildren on husband side(23 f,18 m,-his brother kids,almost 3 m and 1 m our kids,and 2 months old f his sister kid).

Now since my oldest is born (there is big gap between his brother kids) and everyone was super excited for him to be born (he is also my rainbow baby).I’m happy he is surrounded by love but then I got pregnant by my second child like month after my oldest turned one.

But how youngest was growing I notice there is much more pictures on fb on profiles from in laws -especially husbands SIL.Then youngest turned one (now don’t get me wrong I don’t want to sound ungrateful) but everyone got him clothes and also my oldest (compared to my oldest when he turned one or his second birthday got so many toys.There is no gift just for him.)

Husband SIL showed more love to my oldest she does hug and kiss my youngest but more affection is with my oldest.

And tonight that husband SIL posted my oldest on ih story and baby girl from our SIL but there is no my youngest.

Husband parents and my mom love kids equally (well at least when I see them idk what happens behind my back).

Note:I know people are entitled to love more child they want and post what ever and whoever they want and also I should not be expecting gifts for birthdays.And I’m grateful for everything they got and they are passed down from my oldest.

But just that more love towards my oldest compared to my youngest doesn’t sit.

I know I’m AH for this thinking but I just wanted to share this with someone.