The BDE remains deprecated, and for modern development, experts from Embarcadero DocWiki recommend migrating to FireDAC. If you must use it:
: Log in to my.embarcadero.com and look for the "BDE Installer for RAD Studio, Delphi, C++Builder 10.2 Tokyo" in your downloads section. BDE Installer For RAD Studio- Delphi- C Builder 10.2 Tokyo