[data-bs-toggle="collapse"] .fa.default:before {
    content: "\f139" " weniger";
}

[data-bs-toggle="collapse"].collapsed .fa.default:before {
    content: "\f13a" " mehr";
}

[data-bs-toggle="collapse"] .fa:before {
    content: "\f139";
}

[data-bs-toggle="collapse"].collapsed .fa:before {
    content: "\f13a";
}