Can't see some text in an email

[DJG_Shef]

The screenshot shows an email but an amount is not showing. I've tried selecting the text to see if it's been created using white text in the white background. I am using dark mode on an Oppo Android phone.

In another email programs the number, which is in a different font, is clearly visible.

 

[DJG_Shef]

Update.
I found the text!
It was about three screens worth of sideways scrolling. In other words, BT Mail is terrible at formatting a message for the phone screen. To be honest, I've seen this before with emails looking all over the place in BT Mail, though the same email in, say, Outlook on my mobile looks absolutely fine. I fully understand that the sender's formatting is the reason, but many email programs are able to cope.