Short term investment advice

I have the following savings account/investment with me. Currently just want to diversify my investment and to earn more money from the increased interest rate.

• POSB savings account that is used to credit my salary (this is a part of my emergency fund, $~20000 in this account)
• SC Jumpstart Account (I am >26 years old and have ~$30000 into this account, and this is also a part of my emergency fund so I plan to put the excess into fixed deposit accounts or T-bills for short term investment)
• Monthly DCA into VWRA (this would be for long term investment, currently I have been putting $2000 monthly into this since June 2021)
• Free apple stock that I had gotten from MooMoo

Should I be putting a part of what I have (~$10k) into fixed deposit accounts for short term investment? Looking at CIMB fixed deposit account as it's 4.1% per annum interest rate is quite enticing and T-bills also offer a similar interest rate and it is much better than the pathetic interest rate that my POSB savings account is holding.