3👍
Try:
<v-btn v-if="item.estado" @click="add(item)">Add</v-btn>
Try 2:
Check first if item
is coming through correctly by adding the following line. Maybe this will help in tracking down the problem
<template v-slot:item.status="{ item }">
<p>Debug item text: {{item}}</p>
<v-btn v-if="item.status" @click="add(item)">Add</v-btn>
<v-btn v-else disabled>Temporarily no access</v-btn>
</template>
Source:stackexchange.com