I haven’t received BAT in my BAT account
Having a Creator account doesn’t mean you’ll receive BAT regularly. You need to receive a contribution/tip from your channel visitors/viewers/fans.
If there’s no one include your channel on their contribution list/tip, then you’ll not receive BAT in your Creator account.
Creator account is like Patreon or Ko-fi (or other similar platforms) where your visitors/viewers/fans have the ability/can support you with BAT.