Exams Taken Outside UK UCI number

I sat an iGCSE CIE in Singapore and then sat three papers for CIE when moving to the UK as a private candidate. I have registered for two exams with Edexcel for the Summer exams and three exams with CIE. The centre I am doing Edexcel exams at has issued me a UCI but the CIE centre never provided one and said that ‘CIE doesn’t need UCI’. I’m a little worried how sixth form will accept my CIE results and how will UCAS.

If anyone has had a similar experience or knows about this please share, thank you 🙏🏾.