Libor is dead and used to be uncollateralised. Libor-OIS was a useful indicator to measure the spread between risk free (central bank e.g. Fed funds) rate and the interbank lending rate. For example in 2008 the spread shot up reflecting fear in the money markets sector.
Now SOFR has replaced LIBOR and SOFR is collateralised with US treasuries. Therefore there is virtually no credit risk in SOFR, it's a collateralized rate. If I lend 100m for 6 months to another bank though, it's not collateralized.
What can Treasury desk use nowadays to assess the fear factor in interbank lending, other than CDS baskets?