• Nobody mentioned Kerbal Space Program yet? While it's no longer indie, it was during most of the development. It's the space game. While it's not claiming to be a perfectly accurate simulation, it captures the essence of orbital mechanics pretty well. The xkcd comic about it is on point.
• Cultist Simulator. It is a card game that lives from the cards' flavour text. The core gameplay is simple, but the mood the game creates is extremely captivating. You only get served small bits of information at once, and you have to connet the dots yourself (or get spoilers online...). Also, it's not an easy game, and unless you are really lucky you will not succeed in your first few playthroughs.
• Unreal World. This is roguelike survival game set in a fantasy version of ancient Finland.

Turmoil:

It's a 2d game where you drill for oil, then have some light logistics management to do to load it in to barrels on horse waggons and then sell it. It's a lot of fun.

Terraria may be fun for you. It's actiony but very explore oriented and at your own pace.

Goat simulator is a blast.

It's not clear to me that I could ever listen to podcasts while playing most of my library, but I'll do my best to list some with which I might try:

• Euro Truck Simulator 2 (and, by corollary, American Truck Simulator). If you can listen to podcasts in your car, this is basically a similar experience :)
• Super Hexagon. This is not a game about making conscious decisions, it's too fast for that. You'd have to turn off the music, and determine whether you can retain stuff you're listening to at the same time.
• Race The Sun. This is somewhere in the middle of the above two.
• Solace Crafting. This is a relatively bare-bones sandbox RPG with harvesting, crafting, and building elements, that doesn't require all that much decision making, and can be played at any pace.
• Minecraft (the Java edition). You've probably heard of it! I recommend the Java edition due to the rich modding ecosystem; you can usually find a flavor of content that suits any purpose.
• Cities: Skylines (and, by corollary, SimCity 4). These are both world-class genre-defining city builders, which can be played at your own pace, don't require a whole lot of active involvement, and pair well with background listening of your choice.

Mine is currently Civilization 6 and I don’t think I have anything else that could possibly fit; I occasionally have to step back and decide what to do next as it still is a strategy game, but since turns can take awhile (especially in late game since the AIs have to take their turns), having something else to pass the time helps. The dialogue is pretty inconsequential, and turning the game’s sound off won’t really change anything. I usually have music/podcasts going while I play.

(Worth noting it does have lots of DLC, but it doesn’t make winning easier and is entirely skippable.)

Cookie Clicker

https://store.steampowered.com/app/1454400/Cookie_Clicker/

But then, to be a crazy person, you can learn some python and automate the clicking so you get more cookies

Satisfactory.

If you want to "beat" it, then it requires a bit of thinking and planning, but honestly it's such a fantastic go-at-your-own-pace kinda game. It's an open world factory building/sandbox building game. There are objectives and missions, but you have no time limit, and there is some freedom in choosing what you want to work on next.

It's also multiplayer, so you could invite a friend(s) to join and help you explore or find resources. I frequently will watch streams/youtube while playing.