The best way to do this would be to NOT have separate tables. Combine everything into ONE table and use different VIEWS to separate by platform.

I discuss VIEWS at length in my Airtable training course, which you can take for free by signing up for a trial membership with LinkedIn Learning: https://www.linkedin.com/learning/learning-airtable/ 

can't i build it like that?

i want to have each table for a platform and one master table

sorry for the language

here it is update in English -

Okay, so I tried to put everything in the same table and divided it according to different VIEWS, but as you can see, it splits the dates for me if on a certain day I have both a post that I need to upload and a story/release for example.

FB View

IG View

The generally way this is designed is that you have a date column separate from the Primary field. The Primary field would likely be a formula that is a combo of Social Media Account+Post Type+Date.  The field with the Date would likely be a simple date field. You could then create a calendar view that shows everything on that date.

Alternatively, you could keep all the Social Media accounts on one tab but create a separate Dates table. You would turn the date tab above into a linked record field. I think that's similar to what you were trying to do in the beginning?  If so, it's still best to combine all the Social Media tabs into one table that you could link to.  

To create your content plan, you can start by setting up a master table with columns for date, status, comments, and different platforms like Facebook, Instagram, TikTok, and email marketing. Linking the columns will allow you to pull the relevant information automatically. For each specific date, you can use formulas or functions to populate the corresponding content in the linked columns. This way, when you choose a date like 05/18/2023, it will show you what needs to be uploaded on Facebook, Instagram, TikTok, and email marketing for that day. If you're looking to boost your engagement, you might want to consider getting cheap TikTok likes. Remember, take it step by step, and don't hesitate to ask for help along the way.

You can use a simple function like VLOOKUP or INDEX/MATCH in Excel or Google Sheets to make the main column in the master table pull information from the linked columns. This will allow you to retrieve the content that needs to be uploaded for a specific date across all platforms. As for automating the "DONE" status, you can set up a conditional formatting rule or use a formula to check if all the tasks for a specific date have been marked as "DONE" in each platform's table. While organizing your tables is a good start, if you find yourself feeling lost or overwhelmed, consider seeking the assistance of a paid media agency. They can provide you with professional assistance in creating an effective content plan for each platform.