Overly simplistic solution. You need to plan your usage case. Will doors be closed during work (cos of privacy, aircon, etc)? These things affect signal too. In addition to the walls and doors, your furniture and other home installations will also impede signals.
AP placements must be planned. The same with wireless mesh nodes, tbh. But in terms of overall network stability, the APs should have the edge. Ceiling mounted APs are preferred because they typically have the least obstacles, although ceiling beams block signals quite severely compared to drywalls. I've also seen people install in-wall APs low, and then block the AP using the bed, study table, or other furniture - which essentially makes the wifi signal useless for that room.
And because throughput is what is needed, disregard the 2.4Ghz signal heat map and focus on the 5Ghz and 6Ghz maps.
Check out the ceiling mount AP signal map (5Ghz, 2 ceiling mounted Ubiquiti) by
@Mach3.2. He posted his map of a typical 5rm BTO, and it quite clearly displays the effect of walls, doors, and other structures that attenuate or even completely block wifi signals. His placement works for the majority of home users, but we still need to be mindful of the blind spots for some may still want to put a study/dresser table in the MBR blind spot, for example (which can be fixed by extending an in-wall AP to the MBR if needed).
Also, unless Omada has changed their software update policies (I haven't read anything about this), know that their strong obsolence policy remains in effect - don't expect security patches or updates once they have EOL'd your device even just by a simple version point number release. This was the key reason why I left Omada. This policy does not reflect the reality in the market segment their devices purportedly target, which typically has 5 or more years of software update support - even if slower.
