BTW, One other option is to get one of the automatic sliding door openers that can work with a wired switch and then substitute any smart switch you like for that connection to get the automation. And again, you could add an additional keypad as described above.
In terms of sliding door openers, there are three main brands in the space. All are available in multiple countries. Because you want safety features to keep from crushing a child or a pet or even just fingers in the door, it’s best to go with one of the prebuilt solutions rather than trying to do a DIY actuator. There’s a lot that goes into bump stop technology, for example.
Some models have locks, some don’t.
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Skylink Otodor. Usually the least expensive. You used to be able to find these everywhere, but now everyone seems to be out of stock, so I’m not sure if the manufacturer is discontinuing them or not.
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Olide. Comes in quite a few different models, so you have to read the product descriptions carefully. Again, you want one that will allow you to wire in a switch, some models do and some don’t. This is an Asian company that sells in many different countries, and lists on Amazon in both the UK and the US. Look for models that have a wired wall switch, since that’s what you want to replace with a smart device. Or you can get their Alexa compatible add-on Wi-Fi switch and then use an Alexa routine for integration.
- Autoslide. High end for sliding glass doors, sliding closet doors, etc. usually professionally installed, but you can also get a do it yourself kit. Available in multiple regions.
Here’s a Thread discussing autoslide integration: