Looking at this internally, it seems like the 20 values limit is unfortunately hardcoded and we currently do not have a way of changing this, or plans ( from what I’m able to see ) of modifying the value.
I’m sorry about this inconvenience, however I do suggest leaving your feedback on this subject in case this is really impactful. As this is monitored by our Engineering team, other people can vote and create reasoning for implementing this change.