According to the documentation, if an abuse report is submitted and the domain owner or account holder does not provide or monitor an abuse contact, Cloudflare will send the abuse report to the hosting provider. (Source: https://developers.cloudflare.com/fundamentals/reference/report-abuse/abuse-report-obligations/)
However, it does not explicitly state that the report is sent to the hosting provider's abuse contact email. It only mentions that the report is sent to the hosting provider.
It's possible that the hosting provider may not have received the report or may not be using the abuse contact email that Cloudflare has on record. If you suspect that the report was not received, you may want to consider resubmitting the report or contacting Cloudflare's Trust & Safety team directly to inquire about the status of your report. (Source: https://developers.cloudflare.com/fundamentals/reference/report-abuse/abuse-report-obligations/)