Missing special characters with txfonts and XeLaTex in bibliography

Question

Special characters like "ń" and "ł" aren't shown in bibliography. I checked the raw logs and found it:

• Missing character: There is no ł ("142) in font ntx-Regular-tlf-t1!
• Missing character: There is no ń ("144) in font ntx-Regular-tlf-t1!

This is the code:

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage{newtxmath}
\usepackage{newtxtext}
\usepackage{biblatex}
\begin{filecontents}{\jobname.bib}
@book{Wierzchon2018,
    author =    {Wierzcho{'n}, S{\l}awomir T. and K{\l}opotek, Mieczys{\l}aw A.},
    title =     {Modern Algorithms of Cluster Analysis},
    series =    {Studies in Big Data},
    number =    {34},
    year =      {2018},
    publisher = {Springer International Publishing},
    address =   {Cham},
    isbn =      {978-3-319-69308-8},
    doi =       {10.1007/978-3-319-69308-8},
    url =       {https://doi.org/10.1007/978-3-319-69308-8},
}
\end{filecontents}
\addbibresource{\jobname.bib}
\begin{document}
Correct:
Wierzcho{'n} and K{\l}opotek \parencite{Wierzchon2018}
\printbibliography
\end{document}