Changing the logic of filling fields of document entries FF_5

Hello experts,

is there a way to change the logic of filling certain fields of journal entries which are posted as result of uploading electronic bank statements using application FF_5 on S/4HANA Public cloud. Fields Document header text (BKPF-BKTXT), Reference (BKPF-XBLNR) and Assignment (BSEG-ZUONR) are filled with combination of data from tables FEBKO and FEBEP. My question is if it is possible to change logic how the mentioned fields are filled. I would like to change Document header text (BKPF-BKTXT) for a specific value from Note to payee (FEBRE-VWEZW). Is there any extensibility for this on S/4HANA Public cloud?

Thank you,

Matus