Smileys in tree

I have a Z18 phone with ratio 4. I like the tree very much and I would like to stay on it without having to switch on the applications (WhatsApp for instance).
Unfortunately I see no option to write messages in tree with the emotions, which limits the experience .
It may be a setting on my keyboard but I do not have this option.
Could you help me ?
Thanks in advance

Most keyboards have emoji keyboard built in…
Try holding the “enter” button or “comma” button?

thank you Terrence. You’re right. I can access emoji keyboard by holding the enter button .
Problem solved for me