So, I decided to put the money into my TIAA Trad account which is currently paying 6.5%. This is the 'Retirement Choice' (RC) flavor that is not liquid. I was a little hesitant at first because the guaranteed rate for RC is only 1%, but decided to do it nonetheless, in part because it is only 30k that I was looking to transfer.
Today, I checked that the exchange had gone through and saw that the guaranteed rate has changed to 2.8%!

My older vintages (pre-2023) in this RC account show the 1%. So it looks like TIAA decided to increase the guaranteed rate for Retirement Choice from 1% to 2.8%. What a nice surprise! Are others seeing this as well? I haven't seen this being announced anywhere.