Is there a way to have saved favorites show up as Spots on M's and Maestros?

Hi Tom, No, this is not an automatic feature.

It can be done, but it is a home-brew kind of thing. I built a device that provides knobs, buttons and a display for my Flex (TeensyMaestro). As part of the feature creep I built in, I gave it the ability to display spots. Here are the two that I have for 20 meters. I also have a pile of them for 2 meter FM repeaters.

If this is the kind of thing that you are interested in, you can build the TeensyMaestro with only the Teensy board (with Ethernet connector) for around $35 USD. It would have no knobs, buttons or display; it would just connect to your network via Ethernet cable. The spots are set up on the SD Card in plain text. Here is an example of what I have in my TeensyMaestro:

; No spaces in spot text
Spot: 1.8025 W1AW_Bulletins
Spot: 3.5815 W1AW_Bulletins
Spot: 3.652 BARC_8:00_AM
Spot: 7.0475 W1AW_Bulletins
Spot: 14.0475 W1AW_Bulletins
Spot: 18.0975 W1AW_Bulletins
Spot: 21.0675 W1AW_Bulletins
Spot: 28.0675 W1AW_Bulletins
Spot: 50.350 W1AW_Bulletins
Spot: 50.064780 K0IBM/B
Spot: 14.329 Sunday_Flex_Net

Spot: 146.700 W0DK_BARC_100
Spot: 146.520 Simplex
Spot: 145.310 KB0VJJ_Conn_88.5
Spot: 144.200 144.200
Spot: 145.340 N0PQV_Evgn_103.5
Spot: 146.760 W0IA_BCARES_100
Spot: 145.145 W0CRA_CRA_107.2
Spot: 147.225 W0CRA_CRA_107.2
Spot: 145.090 145.090_Packet
Spot: 145.050 145.050_Packet
Spot: 146.640 WA0KBT_DRL_100
Spot: 146.940 W0WYZ_RMRL_103.5
Spot: 146.910 W0JZ_BCARES_123
Spot: 146.610 W0DK_BARC_100
Spot: 145.490 W0TX_DRC_100

Note that this does not create spots from memory items automatically. You do have to edit the config file on the SD card to add or change the spots.

I'm sure this is not the answer that you were hoping for, but it might be a solution.