I want to extract the dynamically filtered read only grid data into excel

I have a scenario where I need to extract the read-only grid data into excel.

For example,

I have a read-only grid with 5 columns. For the grid data, I have applied the "multiple drop down" field for the 3 columns and I'm filtering the data. Say, I have 1000 data in my read-only grid, out of which I have now filtered only 500 row data. Now my grid displays 500 data. How to extract these 500 row data alone into excel.

I don't use record type, (so ruling out the default export to excel option available in record type).

I want the dynamically filtered 500 rows into an excel. Please suggest how I can achieve this?

Thanks in advance!