Hi @infant_Dev ,
Do you want to change the Gender Text Input box into Dropdown box within your Edit form of your app?
Based on the needs that you mentioned, I think PowerApps could achieve your needs. Please consider take a try with the following steps:
1. Go to your Edit screen, select the Edit form.
2. Click "Edit fields" option within right Properties panel
3. Within the Pop-Up Fields panel, select the Gender field, then change the Control type to "Allowed values" option.
4. Unlock the Gender data card in your Edit form, set the Items property of the Dropdown box to following:
["Male","Female"]
Please check the following GIF screenshot for more details:
Best regards,