Weight gain? 8 weeks

My LO is 8 weeks old today- his birth weight was 6 pounds 14 ounces and we placed him on the scale today and he was 8 pounds 10 ounces. My pump output feels solid but I’m worried this is too low of weight. He is EBF except one bottle at night for a longer stretch but I pump twice at night.

He is a boob barnacle, always on the boob for food and comfort, hard to tell which is which. Sometime he will want just comfort but stimulate a let down and starts drinking but then goes back to butterfly sucking.

He has a rough go - had jaundice we had to flush out, then undiagnosed lip and tongue tie until 4 weeks old, then got sick with a cold.

Should I be worried? Did anyone else have this kind of weight gain? What did you do? Should I give up?