Service performed November 2021 and didn't get the invoice until February 2022, can I claim expense in 2021?

I ordered a newsletter printing and mailing in November 2021 and that service was performed later that month.  However, I did not receive the bill until yesterday (February 4, 2021).  I guess this was due to COVID because they don't normally take this long to bill me.  The expense is around $200.  

 

In looking at IRS Publication 538, I cannot claim this expense in 2021 because I've been using the Cash method on my Schedule C.  According to it, I can only claim it for 2021 if I use the accrual method, which I clearly don't.

 

Am I understanding this correctly?  

 

Thanks in advance for any help you can give.