The result is perfect, when you view the page with a Desktop or an Android Device. The LaTex layout is maintained and can be customized as you like. When you upload a generated HTML into a WordPress page, then also upload into the same directory the files connected with it and give according read permissions. The result was obtained by the following command:
make4ht -e build.lua your_file.tex “mathml,mathjax”
with the help of Michal Hoftich, who made make4ht and provided a suitable build.lua file for me as command option. With that calligraphical math characters and math accents are achieved. I think the result is convincing. Many thanks to him.