@olaniyanolanrewaju23

For this purpose, you can use the "Recent Topics" widget instead of "Recent Posts". And if you want to sort/order the list of topics with recent replies yo should make this change:

Open /wpforo/wpf-includes/functions-template.php file and find (first match)  this line:

'orderby' => 'created',

Change it to this:

'orderby' => 'modified',

The code part:

We'll add options to control recent topics order in widget in future releases, so you'll be able to update it safely.

Thanks a lot for the quick reply @Robert,
the issue is that I already had a widget on the home page having Recent topic on the home page in which i want to have another widget which will show popular Topics/ topics with most reply or kind of... 
I think what you suggested will also affect the Recent topic widget i have on that home page already.
Also, if probably there is a way i can edit the code of recent reply not to show Topics repeatedly but just arrange them in order of topics that have most high replies.
Please what else do you think i can do.

I just hope i will get a solution.

I''ll suggest Your team put popular post widget in you to-do list as this will solve a lot of issues.
Best Regards. Thanks.

I'm sorry but I have no other suggestion. You should find some developer to create a custom widgets.

I''ll suggest Your team put popular post widget in you to-do list as this will solve a lot of issues.

Thank you, we'll take this under consideration for sure.