You're thinking of HCSEC. In the majority of their reports they repeatedly complained that they couldn't even get binary equivalence with Huawei's deployed builds (which clearly obviates the value of any code review) but in the most recent available report from 2021 [1], they do report that Huawei had finally achieved that binary equivalence for a core product set.

The government chose to stop publishing HCSEC reports after 2021. I'm unable to work out whether HCSEC itself is still operating or not.

[1] https://assets.publishing.service.gov.uk/media/60f6b6be8fa8f...