You can accept payments on Instagram using a third-party payment processor like PayPal or Square. To set this up, you will need to create a business profile on Instagram and connect your account to your payment processor.
Once you have done that, you can add a payment button to your posts and stories. When customers click the button, they will be directed to the payment processor to complete the transaction.
Alternatively, you can set up a Sellfy store (Sellfy integrates with PayPal), add the store link to your bio, and then refer your followers to the link to start selling.