Extend my wifi 6 router or add a new router + satelites combo?

[MiguelPinto]

Hi Guys and Gals,

 

I have a few questions regarding my network at home (I do work from home permanently so I need really good speads).
My house is configured in a rectangular shape with around 173 meters in length, my router and switch are located in a box (ATI enclosure) inside a wall more or less in the middle of the house (this is relevant).
I do have cable network but is 100Mbit (will upgrade soon to 1Gbit but for now it is limited). I have included a diagram of the house. 

ATI box is where the router and switch are located (I cannot move this at all)
Thick lines are brick walls.
Green is good wifi signal 800Mbit/s, Yellow is ok 200Mbit/s, red no signal or very very weak.

Router is from the internet provider I cannot change this. here are the wifi certification specs:
Date of Last Certification: 2021-05-19

Brand: Vodafone Group PLC

Product: Vodafone Smart Router

Model Number: Huawei OptiXstar HG8247X6-8N

Product Model Variant: Huawei OptiXstar HG8247X6-8N

Category: Cable, DSL or Other Broadband Gateway (Integrated Home Access Device)

Operating System: Linux; Linux

Frequency Band(s): 2.4 GHz; 5 GHz

Optimization

Wi-Fi EasyMesh™
Wi-Fi Agile Multiband™
WMM®
WMM®-Power Save
Security

Protected Management Frames
WPA2™-Enterprise
WPA2™-Personal
WPA3™-Enterprise
WPA3™-Personal
Connectivity

Wi-Fi CERTIFIED 6™
Wi-Fi CERTIFIED™ ac
Wi-Fi CERTIFIED™ n
Wi-Fi CERTIFIED™ a
Wi-Fi CERTIFIED™ b
Wi-Fi CERTIFIED™ g
2.4 GHz Spectrum Capabilities
5 GHz Spectrum Capabilities
Access

Wi-Fi Protected Setup™

 

Ok so after all that, can I just add some wifi 6 mesh satelites on the yellow zones to improve the wifi coverage and use the provider router as it has EasyMesh?
Or should I buy a second Router and 2 satelites where should I put the 2nd router? the ATI box is full it does not fit.

 

I really need to improve the speeds of the network via wifi due to the nature of my work until I get around to change the cabling inside the walls.

 

Thanks in advance for your feedback.

[MiguelPinto]

Update: I've managed to verify my cabled network (cat6) and managed to figure out the reason I couldnt get gigabit connection was the port on the router that only supported 100Mbits, so I've changed where my router connects (port3 that allows for bridge). After that since I could get gigabit in the office and the bedroom office I switched of the wifi from my provider router and added 2 Asus ZenWifi xt8 on each room in Access Point mode for the main XT8 and the otherone as a node. Now I can get 800Mbits on wifi anywhere in the house.