The lemon tool that is used by SQLite can output the grammar as SQL database that you can manipulate. There is https://github.com/ricomariani/CG-SQL-author that goes way beyond and you'll need to create the Rust generation, you can play with it here with a Lua backend https://mingodad.github.io/CG-SQL-Lua-playground/ .

Also I'm collecting several LALR(1) grammars here https://mingodad.github.io/parsertl-playground/playground/ that is an Yacc/Lex compatible online editor/interpreter that can generate EBNF for railroad diagram, SQL, C++ from the grammars, select "SQLite3 parser (partially working)" from "Examples" then click "Parse" to see the parse tree for the content in "Input source".

I also created https://mingodad.github.io/plgh/json2ebnf.html to have a unified view of tree-sitter grammars and https://mingodad.github.io/lua-wasm-playground/ where there is an Lua script to generate an alternative EBNF to write tree-sitter grammars that can later be converted to the standard "grammar.js".