The EU still has a large military industrial base getting revitalised as we speak, it didn't rot, it simply didn't need to pump out massive amounts of gear until this point.
Poland, Germany, France, Spain, Italy, Sweden, Finland, Czechia, etc. all have different kinds of weapons manufacturers. You can even include the UK, and Norway in the mix even though they aren't in the EU.
If the EU had taken their responsibilities seriously given the MASSIVE THREAT next door, Ukraine would have had massive ordinance dumped on it in March 2022 and been free of Russians by Christmas.
The USA also has had it share of preventing the EU from getting involved.