Questions about TP-Link EAP650

I bought the part, but I don't understand how I can install the part and set it up without a switch or something. Is this even possible and if so can someone please help me?

I have a TP-Link Deco network with 3 Deco X20 modules. Works perfectly over 2 floors. Now I need a WLAN extension in a garage about 20 metres away - an additional access point/AP, so to speak. I've tried this with TP-Link Deco X50 Outdoor - but it's too weak. What can I do/buy so that I have a viable solution? e.g: TP-Link TP-Link EAP650?

Comment to Moises Shepherd: With some jargon, does that mean client mode is possible? My scenario: use as an uplink from a switch, which currently works with a TP-Link CPE510, but I want to increase the bandwidth with this one.

Hello Does the device work as an extension to my Wingo router ( Internet Box 2 ) for coverage in the garden. Thank you for your feedback. Greetings Dani

Is there a local web administration interface (WebGUI) (e.g. at address 192.168.0.254)?

Which revision is supplied V1.20 or V1.26?

Hello. Re. power supply: Is a PoE power supply included or a simple DC part?

Does this access point also come with a power supply unit? The product description from Digitec only says "Power supply: PoE". On the TP-Link website, however, it explicitly states that a power supply unit is also included in the scope of delivery: "Supports both 802.3at PoE+ and DC (adapter included) power supply for flexible installations.