ETH2 was years in the making, with multiple delays and not fully migrated yet precisely because of how unsafe standard PoS is. Vitalik and co spent years researching the best mitigations.

Right now, it seems to be one of the best protected PoS chains. It's still fairly new, with novel mitigations, so it still doesn't stand the test of time against all possible attack vectors.

In that sense, it still can't be considered as secure as a PoW chain with high hashrate, which is protected by thermodynamics (you can't produce more hashes than the physical energy you have access to allows).