Awesome files app - Material Files provides a save as share option. GitHub, F-Droid

Also there’s are multiple dedicated save as apps (not in a specific order):

• https://f-droid.org/pl/packages/xyz.myachin.saveto/
• https://f-droid.org/pl/packages/name.lmj001.savetodevice/
• https://f-droid.org/pl/packages/com.mateusrodcosta.apps.share2storage/

There is an open source app called “Save locally”. You find it at https://github.com/MateusRodCosta/Share2Storage and on f-droid.

If you have a file manager app installed you should get that as an option for most content (I use Amaze).

Mixplorer also adds the option in the share menu to save the file.