I know there are opening tickets for it, but there is no new information.
https://github.com/geany/geany/issues/2184 https://github.com/geany/geany-plugins/issues/1012
Geany is a good text editor but it's lagging behind others. As conservative as Emacs, now they have acknowledged the important of LSP support and supported LSP: https://emacs-lsp.github.io/lsp-mode/
LSP is not simply as ctags. People refer to ctags when discussing LSP support make me afraid. There are many language servers out there for various programming languages:
https://microsoft.github.io/language-server-protocol/implementors/servers/
ctags is pretty primitive compared to real language servers like clangd. And please don't confused Jedi python code completion with a language server, Jedi is a library. A language server is much more powerful.