Auto Tune & Facebook API 9 - issue

Hi guys,
PHP 7.4.13 + Joomla 3.9.23 + JFBConnect 8.4.6:

- I updated my Facebook API to v 9.0
- I run the JFBConnect Auto Tune
- Into the Page Tab JFBC suggest to set Page Tab URL as http://...

1 - Well, given that we are only using https//... for the site, does not matter if I enter http://... or https://... , it is always shown saved as https://... and the recommendation is always shown in red... here an image for you
Please, Am I missing anything ?!? And/or Is it a small issue ?

2 - Looking into the Facebook Developer dashboard I noted the Advanced > Domain Manager setting - I really do not remember it, Please, What is it ? Is it anything we have to fill in ?

Hi guys,

1 - Sorry, I suppose the answer for the question 1 is this one - I will wait for the investigation result, thanks

Hi Mel,
many thanks, useful link...