How to slow down restart of interface

I have an internal 3g/4g-Modem, running in serial mode. When no connection can be established, I see lot of activities trying to start the connection, in a cycle:

Thu Sep 29 20:57:59 2022 daemon.info pppd[9277]: Exit.
Thu Sep 29 20:57:59 2022 daemon.notice netifd: Interface 'wwan' is now down
Thu Sep 29 20:57:59 2022 daemon.notice netifd: Interface 'wwan' is setting up no                                                                   w
Thu Sep 29 20:58:01 2022 daemon.notice pppd[9714]: pppd 2.4.8 started by root, u                                                                   id 0
Thu Sep 29 20:58:03 2022 daemon.info pppd[9714]: Serial connection established.
Thu Sep 29 20:58:03 2022 kern.info kernel: [  159.869623] 3g-wwan: renamed from                                                                    ppp0
Thu Sep 29 20:58:03 2022 daemon.info pppd[9714]: Renamed interface ppp0 to 3g-ww                                                                   an
Thu Sep 29 20:58:03 2022 daemon.info pppd[9714]: Using interface 3g-wwan
Thu Sep 29 20:58:03 2022 daemon.notice pppd[9714]: Connect: 3g-wwan <--> /dev/tt                                                                   yUSB3
Thu Sep 29 20:58:04 2022 daemon.notice pppd[9714]: Modem hangup
Thu Sep 29 20:58:04 2022 daemon.notice pppd[9714]: Connection terminated.
Thu Sep 29 20:58:05 2022 authpriv.info dropbear[9955]: Child connection from 192                                                                   .168.30.124:2121
Thu Sep 29 20:58:05 2022 daemon.info pppd[9714]: Exit.
Thu Sep 29 20:58:05 2022 daemon.notice netifd: Interface 'wwan' is now down
Thu Sep 29 20:58:05 2022 daemon.notice netifd: Interface 'wwan' is setting up no  

Is there a possibility to delay the retry of connection establishment, i.e. to retry every 30s or so, not to retry immediately ?