Changes on shopify theme

Description

Hi there,
We recently migrated to the Shopify Broadcast theme and would appreciate your help with a few adjustments:
Color Variation Control:We're currently using a color app, but the Broadcast theme offers native meta object controls for color variations. We'd like to remove the app and switch to the native controls. Some of our competitors are successfully doing this with the same theme, and we can provide references if needed.
Mobile View Adjustment:On the mobile view, we’d like the text to appear beneath the image. The desktop version looks great as is, but we’d like to apply this change to mobile only.
Sub-Collection Linking:One of our products includes a sub-collection, and we’d like to create a link to this sub-collection for easier navigation.
Add Three-Column Tabs:We’d like to add a three-column tab feature, which isn’t currently available in the theme by default.
You should have experience in Broadcast theme, show some links which you worked on.