Solution:
Finally!!! it worked!!!
Lesson learned!!! dont try to mix .htaccess of different folders!!
The wordpress .htaccess didnt need any changes.
The Angular one (subfolder) changed like this :
RewriteEngine on
RewriteCond %{REQUEST_FILENAME} -s [OR]
RewriteCond %{REQUEST_FILENAME} -l [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^.*$ - [NC,L]
RewriteRule ^(.*) index.html [NC,L]
So basically 2 things!!!
- Removed the RewriteBase /myapp/
- Removed the / in RewriteRule ^(.*) index.html [NC,L]
Hope this will help someone else 😉