The case for a Term Risk Free Rate (TRFR) to support the transition of cash instruments and products has been made by BoE and US ARRC over the past year. The TRFR is defined as a rate known in advance (similar to the current Libors) but based on RFRs in the relevant currency.
But the issue of how to construct an IOSCO-compliant TRFR has been a challenge for market participants and benchmark administrators.