Yes. The Remote, a free phone remote for Android TV and Google TV, has a Larger controls setting. Settings describes it as "Easier-to-tap buttons". There's also an Easy remote setting, described as "Label the essentials". Both are switches in the app's Settings.
Larger controls: "Easier-to-tap buttons"
Open The Remote's Settings. Under Remote, turn on Larger controls. That's the setting for bigger buttons.
Easy remote: "Label the essentials"
In the same section, Settings describes Easy remote as "Label the essentials".
You can also choose the app language
The language screen includes हिन्दी, ಕನ್ನಡ, বাংলা, தமிழ், తెలుగు and मराठी, alongside English.
Guest mode limits the remote to the basics
Guest mode limits the remote to navigation, play/pause and volume. To exit, hold the TV name for 1 second.
What you need
The Remote is free, with no ads and no account. It runs on Android phones with Android 8.0 or later (no iPhone version). Your TV needs Android TV Remote Service v2, on the same home Wi-Fi.