Vue @change event not working in <b-form-datepicker/>

I am making a website that has a select form and datepicker form that sends an API request for data. I want to the update the data on every change of these forms, then a "submit" button is not required.

The select works perfectly by using the "@change", but this does not have any effect on the datepicker.

The template is.

<div class="d-flex flex-row flex-nowrap">
            <b-form-select v-model="region"
                           :options="regions"
                           class="select_box"
                           @change="get_data()"
            />
            <b-form-datepicker id="first_day_datepicker"
                               v-model="first_day"
                               :min="min_day"
                               :max="max_day"
                               class="mb-2"
                               @change="get_data()"
            />
            <b-form-datepicker id="last_day_datepicker"
                               v-model="last_day"
                               :min="min_day"
                               :max="max_day"
                               class="mb-2"
                               @on-change="get_data()"
            />
</div>

And the funtcion looks like this(simplified for example)

methods: {
        get_data() {
            console.log("Change data")
        },
}