Find & Replace and hexadecimal Unicode character codes

Hello.
We can search hexadecimal Unicode character codes in a following format: \uXXXX as a regex in Writer and Calc. Can we use (and how if yes) these codes in Replace field also?
[LibreOffice ver 6.4.3.2 (x64), Win 10]

Any help will be appreciated. Regards,

tdf#106137