What about a smartphone keyboard

[dkbit98]

My question have been answered before about Keylogger and Clipboard hacks, they are 100%  real but every comments I read are talking about computers/PC only, can these hacks happen on a mobile smartphone too? Android phones to be precise.

I think it's much easier for keyloggers and clipboard malware to exist on smartphones than on computer devices.
Reason is that keyboard on modern smartphones is mostly software apps, and they can easily be changed with malicious version, most people probably wouldn't notice this.
In general I wouldn't use any smartphone for dealing with larger amounts of Bitcoin, and it's even better to use some open source alternatives like GrapheneOS, LineageOS, DivestOS or CalyxOS, with minimal amount of apps possible.

[BitMaxz]

I tried a few apps before on my old Samsung phone like a key logger. The two option is to install a keyboard or just install an app that can have accessibility that all keyboards keystroke and copied text are recorded I just did this to monitor my kid's activity that's my only purpose.

It's even better to use some open source alternatives like GrapheneOS, LineageOS, DivestOS or CalyxOS, with minimal amount of apps possible.

I don't think it would be safe than using stock OS. Most other OS is rooted and vulnerable to any attacks. I would prefer to use stock firmware than using a different or modded OS.

[Crypt0Gore]

Always stick with Stock OS that comes with your smartphone.

Do not download keyboard app on playstore some of them will store the words you type through them.

Avoid unlocking your phone through Rooting process, many do this but they don't know how dangerous a jailed broken smartphone is.