There are two providers connected to different server network cards (eno1 and eno2). By default, eno1 looks at the Internet. How to configure simultaneous operation of both network cards with the Internet. Preferably through a graphical interface.
There is a two decades old description of the problem: Routing for multiple uplinks/providers
The “Split access” is now called Policy Based Routing and is described by Red Hat: Chapter 21. Configuring policy-based routing to define alternative routes Red Hat Enterprise Linux 8 | Red Hat Customer Portal
The “Load balancing” … I have no idea how to do that with NetworkManager.