Have any other parents ever been concerned that their child might love their yaya more than them? I feel like my kid spends more time with her than me, and it sounds ridiculous but it's something that worries me!

you are not alone. most of working parents, especially those who are abroad, worry about this matter. and I know and feel that as much as you want to spend more time with your child, you just cant because you are working hard for his/her future. constant communication will be one of the keys in maintaining a good and harmonious relationship with your child. and yes, I agree about making sure that your child knows why you have a limited time for him/her. and make sure that whenever you do, make your bonding moments always the best experience for him/her--something that your child will look forward to bonding again with you. quality over quantity. :)