What I conclude from this is:
Chart tooltips display 4dp, regardless of small values <1 or large values in the millions from what I’ve tried
Table values can display up to 4dp, but it looks like the UI reduces the precision by displaying only 2 significant figures for values lower than 1 (e.g. 0.31 will show but not 0.312), yet for numbers larger than 10 you get up to 4 significant figures (3.12, 31.23, 312.3, 3123, 31.23K, 312.3K) ✳️. 🤷♂️
Average column in tables appear to support up to 5dp. Though I think the main logic for it is to show 1dp by default (e.g. 3.0, 30.0, 300.0), unless you have values below 1.0 in which case it seems to be showing 1 significant figure (e.g. 0.00003, 0.0003, 0.003, 0.03, 0.3).
✳️ There must be some complexity in the logic here. 😄 I’d prefer 4 significant figures myself as the default for the UI elements rather than what the current implementation is, but clip the value to 4dp in table values and average column if the UI doesn’t want long “0.00…” values. It just seems like there are some transformations being done to avoid the table getting cluttered, but there are these UI inconsistencies that affect insight.
