Hello!
Thanks for your request! Please ensure you’re following the minimum requirements for feature requests before making a new thread: Welcome to the User Feedback channel!
Both of these requests exist in prior threads so this thread probably shouldn’t have been created. Not a huge issue, but here’s some additional details:
Tilemap editing bundled in the engine is a longterm goal. The hope is to bundle LDtk after the file support and other tilemap items are done: [$225 Bounty] - Integrate/Bundle Level Designer Toolkit (LDtk) into GDevelop as a Tilemap editor · Issue #2991 · 4ian/GDevelop · GitHub, so this request is active, but there is no timeline at this point.
Spritesheet support is an existing request over on the request roadmap, and there are a few threads already here in the feature request forums. Here’s a link to the item on the trello, if it interest you please vote it up! Trello
As these are existing items, I’m going to lock this thread, but keep an eye out as new features can be picked up by contributors and devs at any point.