How to create a corner marktm on an Apple phone?

Take iPhone 7 mobile phone and WeChat v7.0.17 as an example. You can refer to the following steps to create the corner mark:

1. Open WeChat.

2. Click to discover --- Mini Program.

3. Search for superscript generator and click to enter.

4. Select "Letter Superscript Generator".

5. Enter "superscript TM". Then press Enter in the lower right corner.

6. The superscript has been generated, then click "Copy".

7. Find the memo or WeChat chat interface, long press the blank input area, paste will appear, click paste.