We like to represent a release with release timing ambiguity with the estimated release function (Q2 2022), but are looking for a way to represent this visually. One option could be to represent the estimated timeframe across the estimated frame through a visual treatment (dots/dashes) in the release bar.
This would help high-level stakeholders and external teams that interact with Aha! Roadmaps visually see the ambiguity of a release date.