container (cgroup) information:
container_type: cgroupv2
cpu_cpuset_cpus: not supported
cpu_memory_nodes: not supported
active_processor_count: 8
cpu_quota: not supported
cpu_period: not supported
cpu_shares: not supported
memory_limit_in_bytes: unlimited
memory_and_swap_limit_in_bytes: unlimited
memory_soft_limit_in_bytes: unlimited
memory_usage_in_bytes: 3086608 k
memory_max_usage_in_bytes: not supported
rss_usage_in_bytes: not supported
cache_usage_in_bytes: not supported
memory_swap_current_in_bytes: unlimited
memory_swap_max_limit_in_bytes: unlimited
maximum number of tasks: 18968
current number of tasks: 24

There is a little value to show so many values as unsupported. The code has version specific (for containers v1 and v2) printout, but currently it assumes that v2 can print out many of the values that show as unsupported.