First, you want to consider your mediums. How many platforms are you trying to push content out on? Are they all relevant to your audience? (most times, at least with the companies I work with, theres a few platforms that make much more sense than others).
In our case, for online Brands, we aim for this:
Instagram: 1-2 feed posts per day, 1-2 story posts (can be more if engaging with audience)
FaceBook: 1 post per day (most of our content is advertising or pushing older posts, and FaceBook’s organic reach sucks)
Twitter: 1-2 official tweets per day, engage /respond to audiences
TikTok: 1 post per day (we work with influencers and have them make relevant content and we upload that to our account)
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Hope that gives some more insight into it! FYI, these are for online brands doing between 10k – 300k/month in sales, I’m sure strategies vary depending on size / business model, etc.