QuickBooks Online doesn’t currently have a built-in feature to send invoices via text, and as you mentioned, their workaround is just copying the invoice link manually, which isn’t ideal. As for third-party apps, some users have had success with Podium and Thryv, which integrate with QBO and allow SMS invoicing.

Another option could be 3-rd party tools, which can automate sending invoice links via SMS through Twilio or other messaging services. It might take some initial setup, but once configured, it should save time compared to manual texting.