The metrics endpoint on which the wildfly microprofile-metrics-smallrye:2.0 subsystem exposes all metrics can't be scraped with prometheus.
Both the base_gc_time_total & base_gc_total metrics have their help line duplicated which causes prometheus to throw the following error:
Could not build time series for component wildfly: text format parsing error in line 34: second HELP line for metric name "base_gc_total"

I have confirmed this is the case for wildfly 18.0.1