Hi @andrer
As mentioned on Discord all proposals passed and devs started to work on the implementation. The PR is ready and can be viewed here: Shiden - DS burn functionality & 100% fee burn by Dinonard · Pull Request #808 · AstarNetwork/Astar · GitHub
The reason why it was on hold was because of an issue with Weight V2 and upgrading runtime would gave a problem with the Polkadot JS UI. This has been currently been fixed and merged is planned upcoming week.
After burning is ready we will update the supply on Coinmarketcap and Coingecko. Thanks for the reminder.