Website reported as unsafe on Microsoft Edge but no malware found on any scanners

Hello RushMamun!
This is a tricky one, as it can be caused for many reasons. 

First of all it is still happening: 

For sure Microsoft Edge might be flagging your site due to a false positive or a past security issue. Since you've already checked security scanners and consoles, I dont know if you tried requesting a review directly through the Microsoft Edge Safe Browsing portal.

https://www.microsoft.com/en-us/wdsi/filesubmission

You can submit a request there for manual review and resolution.

Additionally, I've checked your site to ensure that it has a clean reputation on services and looks good and confirm that there are no past reports that could be causing this. Here you have some of the screenshots: 

I've left feedback too as reporting it as a safe site.

Conclusion: It seems that you should go straight with Edge Support team to see why they are having this issues. And you should try to contact them trough the link I've left in the beginning

Hope it helps!