.combobox-container {
    display: flex;
    align-items: center;
}

.combobox-container label {
    margin-right: 10px;
}


.my-combobox {
    display: flex;
    align-items: center; 
    padding: 0 0.5rem;
    width: 200px;
}

.slds-form-element__label {
    width: 144px;
    margin-right: -5rem;
}