Lip tie

Jacky • 24

Does this look like it’s affecting her? She’s 5 months and ever since she’s been born her top lip never flares out when latched & if I try to flap it out she looses her suction. I’ve already mentioned it before and they told me it was nothing to worry about. But ever since she’s been born she’s never been able to eat longer than 5mins she always seems frustrated but they never cared bc she’s gaining weight advice?