Thanks for the response.
I have checked the link you attached, the following are the points I saw that could raise the red flags
1). Marriage soon after you met...We met in 2017, got engaged in July 2018 and Married in July 2019. We only saw physically three times before we got married, and we have not seen since after marriage. She had planned to visit in Nigeria, but due to covid-19 lockdown in 2020 and insecurity that's ravaging Nigeria she was advised from not coming, since I planned going to USA immediately my Ir1 is approved.
2). Marriage soon after divorce. She's never married, but I divorced my ex-wife in February 2018 and married her in July 2019 ( 18 months after) .