Remnant: From the Ashes is host to a substantial number of puzzles strewn across its playing area, one of the most interesting of which is the Bell Puzzle. In fact, there are two separate Bell Puzzles to speak of, and they're both found in the world of Yesha.
Down below, you're going to find the exact solutions to these Bell Puzzles, but the catch is that we can't give you their locations, as they depend on the game's randomisation engine. Be sure to keep an eye out for the Pan Flutist and the Red Doe, that's your best bet.
Yaesha Bell Puzzles
As noted above, the only way to come across these Bell Puzzles is for you to go to Yaesha and keep a close eye on two separate NPCs, the first of which is the Pan Flutist.
The Pan Flutist
If this NPC spawns in your instance of Yaesha, it'll be moderately hard to miss due to his upbeat tune. Upon coming closer, you'll notice that there's an altar nearby with five bells hanging off it. For the purpose of this guide, we'll number them 1-5, from left to right.
After hearing his song, you're going to have to replicate it by shooting the bells in the correct order. You can do so if you're musically talented - of course - but the rest of us mortals surely appreciate a more straightforward solution. The correct order of bells is: 3-4-5-3-2-1. Pull that off, and you'll get the special Heart of the Wolf ring, which increases your Stamina by 25 and buffs your movement speed by 10%. A great boon if you're looking to beat the Undying King.
The Red Doe
The second bell puzzle "NPC" can be relatively easily located if you've come across the Widow's Vestry dungeon in Yaesha. The Red Doe should be nearby, but keep in mind that this isn't necessarily always the case.
Anyhow, you should soon come across a giant statue of a resting doe with another set of bells hanging in front of it. After listening to the tune, you should shoot the bells in the following order: 5-4-3-3-4-1-2-3-2-1. And that's that.
Your reward for successfully completing this bell puzzle will be the Scavenger's Bauble, which increases the amount of Scrap you get by a whooping 25%.