+1 upvote and accepted. That link provided, support.apple.com/en-us/118669, answers my question: "You can install eight [8] or more eSIMs on an iPhone and use two phone numbers at the same time." Thank you also for the other information. That's everything I need. I'll leave it there.

Would appreciate reasons for the downvotes from those doing them. I've accepted a) the answer as it provides a link to an Apple doc that says: "You can install eight [8] or more eSIMs on an iPhone and use two phone numbers at the same time." b) given the negative votes that's all I want to spend my time on with this question. I would hope that the question and answer provided are helpful to others. Thank you everyone for their time. Thank you.

@AndyGriffiths +1 for the link, I was looking for 8 numeral not eight as a word, I've found it. That answers my question. As this link is posted in the answer below, I have accepted it.

+1 thank you @Linc Davis I often do that with my questions on StackExchange sites. I will endeavour to do so.

+1 That's a great answer for this question offering a completely separate technical approach as you say, with Apple TV via wireless. I'd say it is a supplementary answer to the others on adding more than 1 external display to the Mac Book Air with Apple Silicon, offering another option. Overall, with all the answers here, they add up to the widest range of options for anyone looking for an answer to the question as to how to connect more than 1 external display to a Mac Book Air with Apple Silicon. I should say my wired solution also works with Intel MB Airs, I can confirm. Thank you!

+1 upvote for information about Silicon Motion InstantView as well as Synaptics DisplayLink. Having a choice between underlying technologies can be helpful in terms of innovation, reliability and price. Also appreciate the background on the original limitations of the Air.

I think there's a lot of ego being demonstrated in comments on this post; people are intoxicated by their high scores. Which is a shame.