Thanks for reaching out and welcome to the Community!
Keep in mind that not all songs on Spotify currently have their lyrics available. However new ones are being added every day, so just because you don't see them for a specific song, doesn't mean they won't be made available in some time.
Also note that option to display the lyrics on desktop devices is not available in all countries and Brasil is one of them. You should head over to this page to stay updated on any new developments. As soon as we have any news on the matter, they will be shared there.
Hope you find this useful. Keep us posted if you have any questions.
Have an awesome day!
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