hey @migq2 , @maks 

in the AI/BI dashboards in your data, add a limit parameter like:
select all from my_table limit :limit_number

to all your tables.

when you're on canvas and adding visualizations, add a filter and create a parameter with single value:

Then you can use that parameter to limit the numbers you're displaying for all the visuals that have that parameter in the limit. here I used the tables in samples.tpch and limit the numbers to 3 rows:

and this a sample query on orders table:

SELECT * FROM samples.tpch.orders limit :limit_number

let me know if this helps or you have doubts.