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Some Ikea sensors can be switched back to zigbee mode by turning on / off quickly many times (6? 10? not sure).
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Not the temperature sensor (Timmerflotte). It has a local display, though.
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And because it's IKEA, they understand the "spouse acceptance factor" well. TIMMERFLOTTEs may be cheap in construction, but look decent enough, blend well (I have a dozen of them stuck around house, mostly next to light switches and nobody notices), and most importantly, the local display is only on for two seconds, and only when you press it.

They have a more expensive variant looks more like desk alarm clock, that also measures particulates and carbon dioxide (and tells time), and that one can stay always-on (and act as Thread router) - but they wisely remembered to add remotely triggerable switch to switch the display off, too.

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I mean to get one of those next time I get near an IKEA. Here at least, it costs less¹ than the sensor inside it.² (Of course, IKEA purchases more than one…)

¹ https://www.ikea.com/ca/en/p/alpstuga-air-quality-sensor-sma...

² https://www.digikey.ca/en/products/detail/sensirion-ag/SEN63...

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Yep, endless grift with this crap. Bought zigbee gateway? Ooops, out of luck, we are selling only Matter comaptible gadgets now..
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Except that many people already have Matter servers with Thread Border Routers in their household. Apple TV, HomePod, Google TV Streamer 4K, various Google Nest Hubs, recent Amazon Echo. Heck, even recent iPhones have a Thread radio, so that they can talk directly to Thread devices [1].

I have a lot of qualms with Threads, such as Thread device internet access through TBRs that do not allow you to disable NAT64 (or even worse, getting globally routable IPv6 addresses in Thread 1.4), but complaining that people have to buy another device is not one.

People are far more likely to have a TBR already than an IKEA Zigbee Hub. And even if they hadn't, they could get any other TBR/Matter Server besides IKEAs. So it's not a great way of selling smart home hubs.

[1] https://appleinsider.com/articles/24/09/18/apple-enables-dir...

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What people do not have though is infinite 2.4ghz channels. I have around 500 zigbee devices over two networks, 2.4ghz wifi and I had to manually split the bandwidth to make it stable. Adding yet another network would probably be too much. I doubt I am the only person with a busy 2.4ghz range.
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Bought he new Ikea movement detector, didn't see that it wasn't ZigBee anymore. Didn't have any of those devices so had to buy another USB dongle for my home assistant NUV.
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