Many VPNs get around it just fine, according to the random experiences I saw online. The issue is not technical, but legal: the traffic is fingerprintable, and that the parties involved (user, ISP) are legally required to store some of the traffic, and to make that available for authorities to check later [0]. I imagine that they handle this like how they handle other law enforcement - by applying it when they feel like. So at the end of the day, don't get caught.
Wireguard is known to be fingerprintable[1]. But at this moment it is unlikely UDP traffic will be filtered by Chinese GFW[2]. But this may change any moment.
