WIFI drops frequently, causing temporary interruptions in streaming/gaming, etc

Hello all, First time poster here for Tech Support. But here's my experience and history:

Have had WIFI without issues for years; recently moved to a new home (same ISP - COX).

Home is approximately double in size as older home, and two story.

Had Cox 50MB plan; but was upgraded to the 100MB plan when moving. All same equipment, same modem, wifi router. After a few weeks, the internet will start to hiccup more frequently. I describe this hiccup as not a complete drop in connection, however, it temporarily disconnects, any streaming occurring will "pause" and after about 5-30 seconds, will resume. The frequency in which case this happens increases over time. I would reset modem/router and all would be fine for a week or so. Then the process starts again. Starts having connection issues.

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About a month ago, I upgraded my Router from a single Apple AirPort Extreme to a new Linksys Velop Mesh system. I assumed, that with the house being much larger, devices were having a hard time maintaining a connection and after a while they would struggle till I reset everything.

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All is very well for a few weeks; then, the cycle starts happening again. Even with the new Linksys system. Funny thing is, the Linksys system is supposed to alert me anytime there are "network drops" - this never happens. So I'm assuming whatever issue I'm having is not a true signal drop but something else.

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My next step is to swap out my Modem, but does anyone else have any ideas on how to isolate and diagnose this?

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Thanks in advance