Posto has a bulk button-replacement feature. Edit one button and all the matching ones update.
First, edit any of the posts with the old button:
- Open the post editor via the
Edit postsection orContent plan. - Tap
Edit→Buttons.

3. Edit the button in one of two ways:
- Delete the old button and create a new one.
- Go to the
Edit buttonssection, choose the button you need, and make your changes.

4. Save your changes.
Bulk replacement
5. The bot recognizes that the button was changed and shows the Bulk replacements section. Go to it.

6. Check the Replace button button.
If you need to update only scheduled or only published posts, open the filter and set the value you need.

7. Tap Apply.
The bot will find all posts with the old button and replace it with the new one.
Published posts are updated gradually, so as not to exceed Telegram's limits. You can track the progress with the /editlog command.