Homey Pro 2023, 3 Bridge satellites, Zigbee and overall capacity?

Having a large house and started early with home automation around 2013 I have collected many separate systems to control everything.

Without listing all various items I can group them into following groups:
5 Hue hubs (Zigbee) 205 items
1 Wiser hub (Zigbee) 20 items
1 Dirigera hub (Zigbee) 15 items
1 Loxone server (KNX) 200+ items?
Other smart products,
robots vacuum, Victron solar,
lawnmower, etc etc around 30 items

In my quite large home I have always had issues with reach and when I saw that Homey had its satellite solution I got excited.
Ordered the Pro and 3 Bridges (satellites). Imagine the relief to finally getting rid of the numerous apps for each manufacturer.
Started migrating Zigbee items and I am now at 110 units and the network starts to act funny. Reading through the community users are saying the satellites are only acting as repeaters. Same function as most wall plugs….
I find it strange that Atom chose to go this route with the satellites.

Anyone having a suggestion on how to overcome the current unit limitation on Zigbee? If I break up the satellites and install the as (separate homes), I guess that I cannot reach the items in ”another” bridge when creating flows concerning the whole house?
My next fear is that the Homey Pro will be bogged down anyway with all my other smart things and at the end many many flows. Around 400-500 actuators, sensors etc in total.

Someone, please easy my mind…

Since you already have them:
You could consider keeping devices on your Hue Bridges.

You just have a lot of devices and Homey/Zigbee might not be able to handle them very well.

In THIS app, multiple bridges are supported.
They create have their own Zigbee network, but the devices can be added to Homey as well, so you can control them from one place.

Just make sure you have enough routers in each Zigbee network to keep a good coverage throughout the house and check Zigbee channels to keep them from interfering with each other (and your wifi, which could be the start of your problem as well).

There’s a lot of info in the Community here that handles interfering Zigbee/WiFi. Just search here for those terms.
This might be a good start as well:

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