Yes, you can request an extension. In the email, you can state the reason why you are requesting an extension. Although it is not compulsory to state the reason for the request, some scholars state the reason for the request so that the editor wont think the author(s) is/are either lazy or are not serious about revising the manuscript.
Yes, a request for extension is possible. Some journals have really short periods for revising a paper, so you can try. There is no guarantee that you get the extension but in most cases it should be possible. As Peterson K. Ozili writes, you can give a reason, which could usually refer to the reviewers' reasoned but also extensive revision requests.
I agree that it is certainly possible, especially given that the period given is short as Michel Charifzadeh says. I agree with the point also made that giving a reason is very important - some journals are very strict (as mentioned by Vishwa Nadham Nadiminti ) but some are more understanding. In general, I have found them to be more understanding in the last two years - they often said to reviewers that a longer time (they give an extension) is permitted because of delays due to COVID. I would think they would grant these to authors in the same way.
Yes, it is possible and should be done if the need arises, stating your reason for the request. However, read carefully the correspondence from the Journal and check is this not clearly prohibited/restricted, as some journals are strict on timelines.