Could A Poor Appetite In My Toddler Be Due To Gas Or Something Else?

Hy I have a 1 year 7 month daughter who is not eating well sometimes she eat without me forcing her to eat..... Sometimes she does want to eat at all.... Sometimes her stomach will be full it don t if she have too much air in her stomach that s why it make her to eat..... I tried all food but she is not eating well.... She weight 9.5kgs