Hey @CC02 and @cabrouxel .
Thanks for reaching out.
Looking into the Ride theme, I noticed that creating a sidebar menu is not available using the Theme Editor. However, you could make a change to the theme’s coding to have a sidebar menu available. Since the Ride theme is designed and supported by Shopify, we may be able to assist you with this adding this.
If you are interested in using design time to have our team take a further look, you will need to navigate to the Help Center to speak with our live support.
Let us know if you have any questions.