Help me to check if the job is a scam or real

"I got an interview call from HR. She discussed everything, and it's a remote role. The company said the technical interview would be held in one week. In the end, she mentioned that having a Lean Six Sigma certification is mandatory. She asked me to complete it before the interview and provided a link for it, which costs $54.

Today, I received another email from the company's domain stating that the technical interview will be held in one week and that I need to submit the certificate before then.

I feel like it's a scam because their LinkedIn page and official website have very limited information—just 2-3 pages. The company name is Converging Technologies.

How can I check if it’s a genuine company or if they are just trying to sell me that course? Also, the offered salary is quite high, around INR 20 LPA."