The issue has been fixed, update from the Polygon team:

We appreciate your support during this time and have an update: we have deployed a temporary hotfix to unblock the Bor chain and resume producing blocks on the Polygon chain. While this solution is temporary, the team is working on implementing a longer-term upgrade to fix the Heimdall issue.

There is an ongoing issue on Polygon Mainnet:
"The Polygon PoS team is currently looking into an issue with the Heimdall implementation which is used by one of the two layers of the Polygon PoS chain. This means the network is currently experiencing downtime which began at 5:50 PM UTC on March 10th."

For more info, please check: https://forum.polygon.technology/t/pos-chain-downtime-and-heimdall-issue/2324

Polygon transactions are not being processed/not coming through. Balances are not updated.