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Fix Dash hidding Excel Header (first row names) while importing

I am using this Dash Template

But it keeps hiding first row of Excel files (.xlsx) which I import and is Header. What I want is to display those Excel Headers in Dash app and one detail is that my Excel Header is Multi-Index (I have 2 rows Headers ehre the first headers has merged cells).

See attached files.

I looked at apps\dash-financial-report\assets css files didnt understand what to change there.

I saw these codes:
.row > .columns:not(:first-child) {
padding-left: 20px;
My question is: is this code what is causing this behaviour?

I found that every time dash upgrades libraries it creates bugs. So, I am downgrading my dash libraries to old versions to allow me using my old templates.