I tried it and it works perfectly, thanks Kermit. I just checked the override delay flag to enable it and it works as I wanted.
I also changed the HA trigger with the event state node with entity “substring” option selected, just to be sure.
[{"id":"53314303.8aab1c","type":"server-state-changed","z":"3c65bbf1.a7e964","name":"Finestre Aperte","server":"","version":1,"exposeToHomeAssistant":false,"haConfig":[{"property":"name","value":""},{"property":"icon","value":""}],"entityidfilter":"binary_sensor.00000000_contact,binary_sensor.0x000000_contact","entityidfiltertype":"substring","outputinitially":false,"state_type":"str","haltifstate":"on","halt_if_type":"str","halt_if_compare":"is","outputs":2,"output_only_on_state_change":true,"for":0,"forType":"num","forUnits":"minutes","ignorePrevStateNull":false,"ignorePrevStateUnknown":false,"ignorePrevStateUnavailable":false,"ignoreCurrentStateUnknown":false,"ignoreCurrentStateUnavailable":false,"x":180,"y":120,"wires":[["9406252f.410bf8"],["9406252f.410bf8","dd01ca42.a73148"]]},{"id":"dd01ca42.a73148","type":"trigger","z":"3c65bbf1.a7e964","name":"loop timer","op1":"","op2":"0","op1type":"nul","op2type":"str","duration":"60","extend":true,"overrideDelay":true,"units":"s","reset":"off","bytopic":"topic","topic":"topic","outputs":1,"x":460,"y":240,"wires":[["262d7d5d.8c5b22"]]},{"id":"9406252f.410bf8","type":"trigger","z":"3c65bbf1.a7e964","name":"initial timer","op1":"","op2":"0","op1type":"nul","op2type":"str","duration":"1","extend":true,"overrideDelay":false,"units":"min","reset":"off","bytopic":"topic","topic":"topic","outputs":1,"x":450,"y":100,"wires":[["262d7d5d.8c5b22"]]},{"id":"262d7d5d.8c5b22","type":"function","z":"3c65bbf1.a7e964","name":"msg telegram","func":"msg.counter=(typeof msg.counter == 'undefined')?1:msg.counter+1;\nmsg.delay=(typeof msg.delay == 'undefined')?2*1000*60:msg.delay*2;\nmsg.elapsed_time=Math.round(\n (Date.parse(new Date())\n -Date.parse(new Date(msg.data.new_state.last_changed)))\n /(1000*60)\n );\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":460,"y":160,"wires":[["dd01ca42.a73148","646792c9.6432dc"]]},{"id":"646792c9.6432dc","type":"debug","z":"3c65bbf1.a7e964","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"elapsed_time","targetType":"msg","statusVal":"","statusType":"auto","x":730,"y":160,"wires":[]}]