I am just going to answer most of the question here.
1. Both Samsung and Huawei have Modem Supporting mmWave. The reason most of their phone dont ship with that features is simply because most carrier on planet earth does not see ( or does not *know* ) how mmWave is going to help their 5G business. Only in US, and specifically Verizon decided to do wide mmWave Deployment. Whether it works remains to be seen. But in terms of building construction and city population density it make more sense than say in China or South Korea. ( Line of Sight and Leasing Arrangement )
2. Samsung has an agreement with Qualcomm to use their SoC as part of the patent settlement. And they end up using Qualcomm in the US version.
3. Qualcomm mmWave module is also slightly smaller than both Huawei and Samsung's counterpart. But to suggest only Qualcomm has mmWave support is objectively false.
4. The Multi-Year supply agreement was well known. Both from investor notes and court document. So I fail to see anything new here. Apple's intention to use is not a *guarantee* statement. Although in reality it is pretty much done because you cant make a decent modem in months. The whole Modem and Antenna Design Phase has to be done 14 months ahead of launch, this was known to the industry and shown in court document with both Apple / Samsung vs Qualcomm Case.
5. That is why we keep calling out the BS when media likes to spin Apple using their own Modem in 2021 / 2022. It just doesn't make any sense. It takes longer than a year to port the Intel 5G Modem design to TSMC, where it previously was Fabbed with Intel 10nm. Let alone parts of the Modem IP in Intel's 5G were not included in the sale to Apple. ( Specific x86 ISA usage within the modem ) Not to mention designing a Modem is hard, designing a modem that is *anywhere* near as good as Qualcomm is downright impossible. Remember Qualcomm's Modem is a moving target. You want to beat X55? They are already on X60.
6. Unless Apple actively participate in the 3GPP Standardisation process, I dont think they will be able to keep up. The industry is doing many ground breaking improvement at an insane pace. Remember 10 years ago Mobile Network could barely hold the capacity of 5% of today's usage. ( May be after at the end of 5G or 6G... but we are still 8-10 years away from that )
7. It makes much more sense to make their own WiFi and Bluetooth controller instead. That is being used in *every* Apple shipping product, closing in to 300M unit a year. They are doing it with Ultra Low Power, but in the performance category they are still using Broadcom. And that is why every few years you see Bloomberg reporting Broadcom looking to sell their WiFi. That is Broadcom ultimatum with Apple if they dont pay a fair price. And so far Apple doesn't seems to be interested in Hi-Pref WiFi controller either. Despite WiFi 802.11 Standard being a much slower moving target than 3GPP.
8. And in Qualcomm Settlement, Apple is now paying SEP patents direct to Qualcomm. Where previously it was through Foxconn. This also allows Apple to make their own Modem as Patents payment and Modem payment are now two separated issues. ( It always was. Despite what Apple have stated in the public )
If you want to read more about the topic but dont want to go deep into Court Document, I suggest Shara Tibken from Cnet. Excellent Reporting specific to 5G. Having previously sided with Apple in the case, because Tim Cook said Apple paid more patents than the next 6 SEP holder combined ( Shown in court as not true ) I have grown tremendous respect for Qualcomm and their CEO from both Samsung and Apple's cases against them. They are expensive, sure. But what is wrong with paying more for the best? ( They can be quite hostile though. But I mean anyone who have ever dealt with any US company will know how they are ALL very aggressive. )