How do you handle a player who never practises outside the team?

I would not make extra practice a test of commitment at U11. If she loves her organised football, trains well and enjoys the team, that is already a positive relationship with the game. Children who play outside sessions will often gain more repetition and may improve some technical areas faster. You can be honest about that without making her feel guilty. If she wants to improve a particular skill, offer a five-minute idea she could try at home. Then leave the choice with her. What I would avoid is turning every free evening into another football requirement. Motivation changes as children grow. The player who does no extra work at ten may become football-obsessed at twelve, and the child doing hours now may eventually want less. Protecting enjoyment is still development.