Applying #Hashtags on Facebook social networking sites allow you to see all the posts and videos on the #Hashtag page related to the hashtag in one place and see how many people have used that hashtag.
You can use a hashtag anywhere on Facebook, but you can also use a hashtag anywhere to go to the feed related to that hashtag and view the post at the same time, but there is no way to trend it by adding a hashtag as comments. The best example of this is when you go to the hashtag #GoHomeGota2022 which they use, the feed will only show you the posts made by entering that hashtag. You will never see comments containing that hashtag in that feed. But if you go to the hashtag on Twitter, Tweet, as well as Reply Tweet, will be displayed.
So you have to use your valuable time to include the relevant hashtags with as many Facebook posts as possible, without leaving hashtags and comments. In the screenshot, you can see below #GoHomeGota2022 as 310K. This means that there are more than 310,000 posts that have been made public using the hashtag.
So the hashtags that are left as a comment in the post will not be trending and you will continue to have comments under the same hashtag in a short period of time as comments under the comments and it will be an unusual activity through Facebook Algorithm once it stops.
Facebook pages will be given a certain penalty period for identifying. (This penalty time is not a restriction imposed by Facebook, but they will automatically reduce the reach and engagement for your Facebook page using their algorithm.) Can go down. Also, your Facebook account that makes such comments will be identified by the Facebook Algorithm as an account caught in unusual activities.