It's nice to see you posting here in the Community forum, keynanhaji.
I'd like to provide you with some information on how to create a payment link for your customers.
Currently, the create payment link feature is only available in QuickBooks Online for the US region and is not available in the UK region. In the meantime, you can use PayPal, Go Cardless, and Zettle by PayPal to allow your customers to pay through online invoicing, recurring bills, or point-of-sale purchases.
To learn more about accepting payments directly from your online invoices, you can check out this link: Invoice Payments.