Yes, it is why countries agreed to send their current stock to Ukraine (Latvia sent all of their helicopters, all four of them lol, Slovenia sent old M-55 tanks and received Leopards or IFVs iirc, Netherlands and Denmark are sending F-16s since they're replacing them with F-35s from the US, Denmark also sent all of their Caesar SPGs and is most likely gonna buy new ones, and so on).
Yes, it is why countries agreed to send their current stock to Ukraine (Latvia sent all of their helicopters, all four of them lol, Slovenia sent old M-55 tanks and received Leopards or IFVs iirc, Netherlands and Denmark are sending F-16s since they're replacing them with F-35s from the US, Denmark also sent all of their Caesar SPGs and is most likely gonna buy new ones, and so on).
Here's a list from May of the different "coalitions" working to arm Ukraine.