Ok, so I think it is fair to share my findings with this provider:

Company: https://www.bitdeal.net(https://www.goodfirms.co/company/bitdeal)
1. They are based out of India. Their site is old schoolish.. But I've worked with really good Indian teams with worst websites. (Don't judge a book by its cover))))
2. They have great customer services and very responsive sales reps who more or less understand tech (maybe sometimes dumb it down to sell you their product)
3. They have a LinkedIn presence and 3 different team members connected to my LinkedIn within the first hour of communication

Mobile Product: https://play.google.com/store/apps/details?id=com.application.bdamx&hl=en
1. 5 reviews / 100+ downloads
2. I didn't download the app
3. Programming languages/frameworks:
- Android - Kotlin
- iOS  - Swift
then they started saying things that did not make sense:
- Ours is frontend - HTML and CSS 
- Backend - PHP, Laravel (website) 
- Trade matching engine - PHP 
- Deployment will be based on your preferable server architecture ...
4. Price:
- Android - 5000 USD
- Ios        - 6000 USD
5. The application is a monolith with built in KYC. I was told that they can add API and multiple KYC providers for different regions, but I doubt it.

I thanked them for their time and information.

Summary: I think this was the needed research and it led me to a dead end.

Company: https://sodio.tech/ (https://www.goodfirms.co/company/sodio-technologies-pvt-ltd)
- Contacted, waiting on reply.

Hopefully this information helps someone in the future!