TD Ameritrade without fail always had the forms ready by January 31.
Upon doing some research, I learned Schwab has had issues with 1099 accuracy in years past, so a number of years back, they decided to defer 1099 form issuance by several weeks to reduce the need to issue amended 1099s.
This is an annoyance. My Fidelity acct forms were fully available as of this morning. I was planning to file my 2024 tax returns next weekend; now I have no choice but to wait.