BCLO
iShares BBB-B CLO Active ETF
stock NASDAQ ETF

If you want more return than t-bills, you are going to have to assume some risk. How much depends on what you can tolerate in terms of both volatility and meager returns.
Lowest volatility, most pathetic returns --> CLO funds (PAAA, JAAA, FAAA, CLOA) for a bit more return + volatility, lower grade CLO funds (FCLO, BCLO, CLOB)
Slightly more volatility and slightly less pathetic returns --> corporate bond fund (IGIB, SCHI, VCIT)
Even more volatility and somewhat better returns --> high yield bond fund (FALN, HYS, SPHY, FDHY)
More volatility, greater possibility for growth --> balanced funds (AOR, AOM, AOK, RPBAX, FBALX (Fidelity only), VBINX (Vanguard only), TRRIX, VWINX (Vanguard only), INCM, INCE, VTINX (Vanguard only), CGBL
Low volatility equity funds --> ONEV, LGLV, VFMV
Value equity funds --> FNDB, VTV, MGV

If you want more return than t-bills, you are going to have to assume some risk. How much depends on what you can tolerate in terms of both volatility and meager returns.
Lowest volatility, most pathetic returns --> CLO funds (PAAA, JAAA, FAAA, CLOA) for a bit more return + volatility, lower grade CLO funds (FCLO, BCLO, CLOB)
Slightly more volatility and slightly less pathetic returns --> corporate bond fund (IGIB, SCHI, VCIT)
Even more volatility and somewhat better returns --> high yield bond fund (FALN, HYS, SPHY, FDHY)
More volatility, greater possibility for growth --> balanced funds (AOR, AOM, AOK, RPBAX, FBALX (Fidelity only), VBINX (Vanguard only), TRRIX, VWINX (Vanguard only), INCM, INCE, VTINX (Vanguard only), CGBL
Low volatility equity funds --> ONEV, LGLV, VFMV
Value equity funds --> FNDB, VTV, MGV