Hi Darshana Gunjal,
For your requirement, I would recommend the Bootstrap multi-select dropdown widget which is available in Appstore. By using this widget, you can select multiple values and you can able to do search filters too. For that, you need to use many to many associations between two entities. For your reference, I will share that widget link in the AppStore below. I hope it will help you.
Thanks and regards,
Can you please check “AutoComplete Widget” on marketplace.