The lid of a CSP is secured to the main body by two screws , and is a compression fit , so how did the lid become open and capable of being damaged by the ‘weather’ ?, if it were a recent install you could argue it was never secured at installation , but how long has this been installed ?, BTW , I don’t think the lid can be replaced separately, the entire CSP would need replacing, requiring the wiring to be removed from one CSP , reintroduced into the new CSP and re spliced.
It no doubt just aesthetics, there is nothing metal to corrode, although the lid should be in place to stop potential interference with the fibres rather than any adverse performance issues ( it would work happily completely submerged under water for example )
….if BT are your provider ( it’s not clear if they are ) you could try to report it , but under what guise, and would it be potentially chargeable ?, report it to Openreach directly ?, the reporting form for damaged or dangerous OR ‘plant’ is normally Openreach plant sited on public property ( roads and footpaths where no individual is could be deemed responsible for damage ) not individual equipment on property where that individual can be deemed responsible if damage is more than reasonable wear and tear
