The Graph protocol is midway through its migration to L2 on Arbitrum. That means that graph indexers on ETH mainnet are moving over to the Arbitrum chain and any staked GRT tokens on mainnet also need to be manually migrated to Arbitrum.
Seeking Yield by Staked - Issue 86: ⛓️ Tracking Eth2, 📈 Elrond Mainnet Milestones, ⚖️ The Graph Network Governance, 📊 Current Staking and Lending Yields, & More