My quick take on multiple select component for Tamagui.
yarn add tamagui-multiple-select
import { Select, SelectProps } from 'tamagui-multiple-select'
Same props as Tamagui Select component, except value is an array of selected values and onValueChange is a function that takes an array of selected values.
This component is only compatible with Tamagui 1.15.13 due to version mismatch issue. You can clone the repo and replace the tamagui versions in package.json with the one you are using. I'll try to fix it in the future.