I assume the job is for EU citizens, with relocation assistance available. They phrase this as “we can only relocate candidates who are in the EU”.
GP is here to point that this is a misleading way to phrase it because “EU citizens” isn’t synonymous with “people who live in the EU”, which is insufferably pedantic even by the standards of HN.
For Germany specific Blue Card, company doesn't really need to support the candidate, its fairly straight forward and easy to obtain if the candidate has the salary & degree for BC, they just need a job contract.