I found an excellent radiation shield model from @ilMitch_97530. Unfortunately, I don't use Aqara sensors. So I adapted the original holder for the temperature and humidity sensor TP-Link Tapo T310. It was easy because the author also posted the STEP files.
First I had to enlarge all the parts by 30%. I adjusted the shape of the Top Part for better printing and of course I had to remodel the Sensor Holder. I also lengthened the Wall Holder by 120 mm. In my opinion, the Radiation Shield would be too close to the wall and it could affect the sensor's readings.
Due to UV resistance, I decided to use ASA, specifically Spectrum ASA 275 in white colour of course.. It is a very well printable material and a closed chamber is not required for printing. It's just a good idea to apply a separation layer (3DLAC, etc.) to the hotbed. If, even after cooling, the print still sticks too tightly to the hotbed, Isopropyl alcohol and waiting a while will help.
Some parts require supports. Please see the attached 3MF files for detailed print settings.
If you want to modify the model, I am attaching the STEP file and a link to my OnShape.
Please keep in mind that the TP-Link Tapo T310 sensor IS NOT intended for outdoor use. I cannot rule out that the sensor may be damaged in extreme weather conditions.
Please don't forget to leave a rating or a comment. Feedback is important for me Thank you very much.
A special thanks to @ilMitch_97530 for the original design.
[11/11/2023]
In order to increase the strength of the attachment to the wall, I had to update the parts to the V03 version:
The author remixed this model.
Modification of the model for TP-Link Tapo T310