I would ignore it. If she is attention seeking, if nobody takes any notice, the fun has gone out of it. You could insist she washes her hands between courses and/or wears an apron to protect her clothes, little things that makes eating with fingers a bit of a hassle.
If the problem is something inside herself, again, best ignored, while she argues it out with herself.
Until my grandson was 10 hewould not sleep anywhere unless one of his parents was in the house. He wouldn't even do a sleepover without a parent. He wouldn't stay with grandparents. then one day he came home from school asked to go on a sleepover, and when told, of course, but mummy cannot come that night, said 'thats alright' and went off on his own - and we have never looked back.
Some children have minor blockages in development, but usually get over them before they go to secondary school.