Teachshare (https://www.teachshare.com/) generates lesson plans and materials from an instruction and course specifications (audience, objectives; duration…).

Editable and amendable plan and materials (presentation, student sheets, etc.). Possibility of creating recurring generation templates (“presets”).
A chatbot (in English) allows you to talk about generations and ask for improvements.

Chrome extension available.
Sharing url, export goggle classroom and pdf.

Free and seems unlimited for individual use.