reCAPTCHA V2 not working

Is V2 still supported? V3 doesn’t work very well, we often get calls from potential clients that were unable to submit, and we can replicate the issue on multiple PCs/networks etc.

We want to use V2 instead, I created the site keys, added to CF7, added the [recaptcha] tag but it doens’t show up, and submitting the form always results in “There was an error trying to send your message. Please try again later.”.