For puzzle games like Baba Is You or puzzle-focused genres like point-and-click adventures, I don't look things up. I am totally comfortable with the idea of dropping the game outright if I hit a wall. If I want to see all the content, I have to earn it. Looking up the answers defeats the purpose of playing the game at all.
(I'm fairly deep into Baba Is You, totally blind, and can't imagine conceding after ten or twenty minutes. Some of these puzzles should take an hour or more to click if you don't have the right mindset for them, and if you don't understand the concepts well enough to put them together on your own, you're only setting yourself up for more failure in later stages, perpetuating a cycle of surrender and shame.)
Collectibles are a different story. I rarely have the patience for the endgame sweep from 95% to 100% if I need to run around checking every possible corner of the map, and for catalogues like enemy galleries or the Spirits list in SSBU, I'll look up what I'm missing so I can make a concerted effort to fill it in instead of stumbling about blindly. I rely on in-game resources for this whenever possible: completion percentages on zone maps and inventory screens, or secret-hunting items like the ones in DKCTF and Yoshi's Woolly World (for mopping up the last few missing puzzle pieces or stamps, respectively). If 100% doesn't look that interesting to complete, I don't bother.
And even so, I take a long time to break. In BotW I think I looked up a total of two shrine locations, as I thought I had swept the map pretty thoroughly by that point and had no idea where to check, and I honestly wish I hadn't. I'm still missing three side quests on my file, I think, and it's only now at the two-year mark that I'm seriously thinking about consulting a list just to clean them up.
It depends on how much you trust the designer, of course.
The ideal sensation you want to get from looking something up is: "Okay, I would never have figured that out myself." Until I'm very confident that will be my precise reaction, I'd rather not risk the disappointment of spoiling something totally within my reach.