Look at RockBros on amazon that has the cellphone holder and storage compartments.

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https://www.amazon.com/RockBros-Waterproof-Mountain-Bicycle-Screen/dp/B07F62K7W3

This works ROCK BROS Bike Bag Waterproof Top Tube Phone Bag Front Frame Mountain Bicycle Touch Screen Cell Phone Holder Pouch Compatible with iPhone X, 8 Plus 7 https://www.amazon.com/dp/B07F62K7W3/ref=cm_sw_r_cp_api_i_3DV965BZJCN65DGQVFVK?_encoding=UTF8&psc=1