This is the BPC-0902DC, the 11.1V, 2A AC-DC Charger you need for charging 9V LiFePO4 by Bioenno or other LFP brands.
Bioenno Power offers a 11.1VDC, 2A AC-to-DC Charger for LiFePO4 batteries, Model BPC-0902DC, which uses a DC plug for charging 9V LiFePO4 batteries. Please ensure that the LiFePO4 batteries include a PCM/BMS when using this particular charger.
Input: 110 VAC
Output: 11.1VDC, 2A (CC/CV Charge Profile for LiFePO4 Batteries)
Dimensions: 5.25 in. x 2.25 in. x 1.125 in. (L x W x H) 133.35 mm. x 57.15 mm x 29.00 mm
Weight: 1 lb. (0.45 kg.)
Connector: DC Plug