Design is using font-weight: 500 for bold body text, which is based off of 500 weight in the variable font, and that update is landing in https://github.com/patternfly/patternfly/pull/6070/files and https://github.com/patternfly/patternfly/pull/6071/files. Need to update the defaults to use the variable font, and create an opt-in to use the non-variable font and font-weights.