Some information for you:
- She needs to look into this list:
https://www.gov.uk/government/publicati ... -and-codes
and find her job title/occupation and its SOC code. These are eligible occupations that can potentially justify a skilled worker visa.
- Pass an IELTS English test. It's a requirement for a skilled worker visa if you are from Brazil.
https://www.gov.uk/skilled-worker-visa/ ... of-english
There is no point looking for a sponsor if you don't have this document in hand already. Imagine she finds a sponsor but she doesn't have an IELTS ready and next appointment for that is in 2 months or she gets a score that is not enough for that visa. Get that IELTS out of the way.
- Most employers in the UK aren't going around sponsoring people from abroad. They do it only if they don't have any suitable candidate in the local market. These visas involve money, paperwork and a lot of bureaucracy. Employers avoid them when they can. So if she has skills that are in shortage in the UK (few people have these skills), her chances to find a sponsor are indeed higher.
- You said she is working directly with clients and partners in the UK. I have seen many cases where such direct professional relationships helped finding a sponsor. If a potential sponsor knows her, worked already with her and appreciates her professionalism, that sponsor is more likely to help her to secure a visa. She can dig in that direction, check their websites for available careers and don't be shy to engage conversations about that. Most people are receptive and willing to help if the connection is there.
Good luck!