Regarding "Touch 4 Keyboard Mouse," I couldn't find any information on an official app with this name. If you're interested in using a keyboard and mouse app, you may want to explore alternative options, such as:
In 2022, cybersecurity firm Pradeo discovered a fake “Touch 4 Keyboard Extra Quality” APK that contained the Joker malware — a subscription drainer that silently signs users up for premium SMS services.
If you must sideload: