The /fill command is not working with polished and normal andesite, granite or diorite but it works with their stair counterparts. I have no idea why unless it's a feature
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The bug tracker isn't the best place to ask for help, unless you know a bug is causing your problem. In future, you can get information like this from the Minecraft wiki. If you find the wiki too confusing, you can ask for help from Community Support. Links for both are below.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Mojang Support – ✍️ Feedback and Suggestions – 📖 Game Wiki
These are stored by the game as variants of stone. See my comment on MCPE-68488.